WO2010127489A1 - 检测信号延迟的方法、检测装置及编码器 - Google Patents
检测信号延迟的方法、检测装置及编码器 Download PDFInfo
- Publication number
- WO2010127489A1 WO2010127489A1 PCT/CN2009/071669 CN2009071669W WO2010127489A1 WO 2010127489 A1 WO2010127489 A1 WO 2010127489A1 CN 2009071669 W CN2009071669 W CN 2009071669W WO 2010127489 A1 WO2010127489 A1 WO 2010127489A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delay
- correlation function
- value
- cumulative cross
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
- H04S1/007—Two-channel systems in which the audio signals are in digital form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/03—Application of parametric coding in stereophonic audio systems
Definitions
- the present invention relates to the field of signal processing technologies, and in particular, to a method for detecting signal delay, a detecting device and an encoder.
- stereo technology has been greatly developed.
- the stereo coding method currently used in stereo technology is parametric stereo coding.
- the left and right channel signals are generally downmixed to encode the generated downmix signal.
- the left and right channel signals have a certain delay. Therefore, if the delays of the left and right channel signals are correctly detected, the signals can be synchronized according to the delay, thereby facilitating the improvement of the stereo composite signal. quality.
- the prior art provides a method of detecting signal delay: Assuming that the left channel is ahead of the right channel, the delay of the signal is positive, whereas the delay of the signal is negative.
- Embodiments of the present invention provide a method, a detecting apparatus, and an encoder that can improve the accuracy of detection signal delay.
- a method of detecting signal delay comprising:
- the determined value is determined according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function
- a detecting device comprising:
- An obtaining unit configured to obtain a first cumulative cross-correlation function according to a cross-correlation function between the acquired channel signals
- a first delay processing unit configured to determine a first delay between channel signals corresponding to the first cumulative cross-correlation function
- an adjusting unit configured to adjust the second cumulative cross-correlation function according to a relationship between a first delay and a second delay between the channel signals, where the second delay is obtained when the second cumulative cross-correlation function is adjusted and The first determined value of the second delay is determined according to an initial value of a second weighting coefficient of the second cumulative cross-correlation function;
- a second delay processing unit configured to determine that the second delay corresponding to the adjusted second cumulative cross-correlation function is a delay between the detected channel signals.
- An encoder comprising:
- a signal acquisition device configured to acquire a channel signal
- a detecting device configured to acquire a first cumulative cross-correlation function according to a cross-correlation function between the channel signals; determining a first delay between the channel signals corresponding to the first cumulative cross-correlation function; The relationship of the first delay and the second delay adjusts the second cumulative cross-correlation function, the second delay is obtained when the second cumulative cross-correlation function is adjusted and the first determined value of the second delay is according to the second accumulation The initial value of the second weighting coefficient of the cross-correlation function is determined; determining that the second delay corresponding to the adjusted second cumulative cross-correlation function is a delay between the detected channel signals.
- the technical solution of the embodiment of the present invention is to obtain a first cumulative cross-correlation function according to a cross-correlation function between channel signals, and determine a first delay between channel signals corresponding to the first cumulative cross-correlation function. Adjusting the second cumulative cross-correlation function according to a relationship between a first delay and a second delay between the channel signals, the second delay being obtained when the second cumulative cross-correlation function is adjusted and the second Determining the first determined value of the delay according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function; after adjusting the second cumulative cross-correlation function, determining that the corresponding second delay is between the detected channel signals
- the delay of the determination can reflect the change of the positive and negative of the delay of the channel signal, thereby improving the accuracy of the detected signal delay.
- FIG. 1 is a flow chart of a method for detecting a signal delay according to an embodiment of the present invention
- FIG. 2 is a flowchart of a method for detecting a signal delay according to Embodiment 2 of the present invention
- FIG. 4 is a schematic diagram of a signal tracking waveform of a detection signal delay according to Embodiment 2 of the present invention.
- FIG. 5 is a flowchart of a method for detecting signal delay according to Embodiment 3 of the present invention.
- Figure ⁇ is a flowchart of a method for detecting signal delay in the fourth embodiment of the present invention.
- FIG. 8 is a flow chart showing the detection of the validity of delay variations of different channel signals according to Embodiment 4 of the present invention.
- FIG. 9 is a schematic diagram of a signal tracking waveform for detecting the effectiveness of a delay variation according to Embodiment 4 of the present invention.
- Figure 10 is a schematic view showing the structure of a detecting device according to an embodiment of the present invention.
- FIG. 11 is a schematic diagram showing the structure of a detecting device according to an embodiment of the present invention.
- FIG. 12 is a schematic structural diagram of an encoder according to an embodiment of the present invention.
- Embodiments of the present invention provide a method, a detecting apparatus, and an encoder that can improve the accuracy of detection signal delay.
- Step 101 Acquire a first cumulative cross-correlation function according to a cross-correlation function between channel signals
- Step 102 Determine the first cumulative mutual a first delay between the channel signals corresponding to the correlation function
- Step 103 adjusting the second tired according to the relationship between the first delay and the second delay between the channel signals a cross-correlation function, the second delay is obtained when the second cumulative cross-correlation function is adjusted and the first determined value of the second delay is determined according to an initial value of a second weighting coefficient of the second cumulative cross-correlation function
- 104 Determine a second delay corresponding to the adjusted second cumulative cross-correlation function as a delay between the detected channel signals.
- the adjusting the second cumulative cross-correlation function according to the relationship between the first delay and the second delay between the channel signals comprises: acquiring an initial value of the second weighting coefficient of the second cumulative cross-correlation function; determining the first delay and the second When the delays are not equal, the initial value of the second weighting coefficient is reduced to obtain a reduced value; and the second cumulative cross-correlation function is updated according to the value of the reduced second weighting coefficient.
- Or adjusting the second cumulative cross-correlation function according to the relationship between the first delay and the second delay between the channel signals comprises: setting a value of the second weighting coefficient of the second cumulative cross-correlation function according to the sound field information of the first cumulative cross-correlation function When it is determined that the first delay and the second delay are not equal, the value of the set second weighting coefficient is reduced to obtain a reduced value.
- the first cumulative cross-correlation function may be a short-time cumulative cross-correlation function
- the second cumulative cross-correlation function may be a long-term cumulative cross-correlation function
- the technical solution of the embodiment of the present invention obtains a first cumulative cross-correlation function according to a cross-correlation function between channel signals; and determines a channel between the channel signals corresponding to the first cumulative cross-correlation function a delay; adjusting a second cumulative cross-correlation function according to the relationship between the first delay and the second delay, the second delay being obtained when the second cumulative cross-correlation function is adjusted and the first determined value of the second delay Determining according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function; after adjusting the second cumulative cross-correlation function, determining that the corresponding second delay is a delay between the detected channel signals, the determining The delay can reflect the change of the positive and negative of the delay of the channel signal, thereby improving the accuracy of the detected signal delay.
- FIG. 2 is a flowchart of a method for detecting signal delay according to Embodiment 2 of the present invention, and Embodiment 2 describes a method of an embodiment of the present invention in more detail than Embodiment 1. As shown in Figure 2, including the steps:
- Step 201 Acquire a current cross-correlation function of the left and right channel signals.
- cross-correlation function cc/W is only illustrated by the above formula (1), but is not limited thereto, and can also be obtained by other formulas, for example, according to the following formula (2):
- Step 202 Acquire a short-term cumulative cross-correlation function, and determine a first-delay corresponding to the short-term cumulative cross-correlation function.
- the cumulative cross-correlation function can be further divided into a short-time cumulative cross-correlation function and a long-term cumulative cross-correlation function, which is a relative concept. Let the short-term cumulative cross-correlation function be S—Cc/(i) and the weighting coefficient “set to “1”.
- the long-term cumulative cross-correlation function be /—Cc/(i), and the weighting coefficient “set to 2, where 1 ⁇ «2>"1>0.
- s _ ccf id) s _ ccf (d) * 1 + ccf (d)
- I ccf(d) I ccf(d) * a2 + ccf(d)
- the weighting coefficient "1 can be obtained according to experience, then different values of the short-time cumulative cross-correlation function can be obtained, and a larger value such as the maximum value or the second value is selected from these values.
- the large value determines that the time corresponding to the maximum or the second largest value is the first delay of the short-term cumulative cross-correlation function.
- Step 203 Adjust a weighting coefficient " 2 " of the long-term cumulative cross-correlation function according to the first delay and the second delay determined in the next step.
- Step 204 Determine a second delay corresponding to the long-term cumulative cross-correlation function according to the weighting coefficient “ 2 update long-term cumulative cross-correlation function, and determine the second delay as the delay of the left and right channel signals.
- the calculation formula for the long-term cumulative cross-correlation function is as described above.
- the long-term cumulative cross-correlation function is updated, and different values of the long-term cumulative cross-correlation function can be obtained, and a larger value such as a maximum value or a second largest value is selected from these values to determine the maximum value.
- the time corresponding to the second largest value is the second delay of the long-term cumulative cross-correlation function, and the second delay is determined as the delay of the left and right channel signals.
- the long-term cumulative cross-correlation function can be obtained by setting an initial value for the weighting coefficient " 2 ".
- the subsequent second delay is obtained by calculating the long-term cumulative cross-correlation function according to the adjusted weighting coefficient " 2 ".
- the second delay determined by the above steps can reflect the change in the positive and negative of the delay of the signal.
- FIG. 3 is a flow chart of adjusting the weighting coefficient " 2 " in the second embodiment of the present invention, including the steps:
- Step 301 initializing the weighting coefficient "2;
- Step 302 Determine whether the first delay and the second delay are equal. If yes, go to step 304, if no, go to step 303.
- the step determines whether the first delay and the second delay are equal according to the first delay and the second delay, and proceeds to different steps according to the judgment result.
- Step 303 Perform a reduction process on the weighting coefficient "2".
- This step may be to multiply the weighting factor "2" by an adjustment factor greater than zero and less than one.
- the adjustment The coefficients can be set directly based on experience; or, different adjustment factors can be selected depending on the maximum value of the long-term cumulative cross-correlation function.
- Step 304 Maintain the weighting coefficient "2 unchanged.
- FIG. 4 is a schematic diagram of a signal tracking waveform of a detection signal delay according to Embodiment 2 of the present invention.
- the waveform a is a signal tracking diagram of the prior art
- the waveform b is a signal tracking diagram of the embodiment of the present invention.
- the technical solution of the embodiment of the present invention divides the cumulative cross-correlation function of the left and right channel signals into a short-time cumulative cross-correlation function and a long-term cumulative cross-correlation function according to the channel signals.
- Obtaining a short-time cumulative cross-correlation function determining a first delay corresponding to the short-term cumulative cross-correlation function; adjusting the long-term cumulative cross-correlation function according to the relationship between the first delay and the second delay, The second delay is obtained when the long-term cumulative cross-correlation function is adjusted; after adjusting the long-time cumulative cross-correlation function, it is determined that the corresponding second delay is the delay between the detected channel signals, the determined The delay can reflect the change of the positive and negative of the delay of the channel signal, thereby improving the accuracy of the detected signal delay.
- FIG. 5 is a flowchart of a method for detecting signal delay according to Embodiment 3 of the present invention.
- the difference between the third embodiment and the second embodiment is mainly that the process of adjusting the weighting coefficient " 2 " is different, and the reference to the sound field signal is as shown in FIG. 5, including the steps:
- Step 501 Acquire a current cross-correlation function of the left and right channel signals.
- Step 502 Acquire a short-term cumulative cross-correlation function, and determine a first-delay corresponding to the short-term cumulative cross-correlation function.
- steps 501 - 502 are the same as those described in steps 201 - 202 in the second embodiment.
- Step 503 Adjust a weighting coefficient " 2 " of the long-term cumulative cross-correlation function according to the first delay and the second delay determined in the next step.
- Step 504 Determine a second delay corresponding to the long-term cumulative cross-correlation function according to the weighting coefficient " 2 update long-term cumulative cross-correlation function, and determine the second delay as the delay of the left and right channel signals.
- step 204 is the same as described in step 204 and will not be described here.
- the second delay determined by the above steps can reflect the change in the positive and negative of the delay of the signal.
- 6 is a flow chart of adjusting the weighting coefficient " 2 " in the third embodiment of the present invention, including the steps:
- Step 601 according to the cumulative cross sound field information related functions to determine the weighting coefficient "a value of 2;
- the process of the second embodiment is different than the weighting coefficients are initialized, but according to the cumulative cross sound field information calculating weighting coefficient correlation function" 2
- the current frame cross-correlation function takes Cc /(") , -: ⁇ ⁇ , ⁇ >0 as an example.
- the specific process can be as follows:
- Cur _ ratio Ccf (") I ⁇ Ccf (")
- the cur-ratio can be limited to A range, such as ⁇ 3 ⁇ 4101, 11 ⁇ >, where the values of min and max can be set according to experience, the value of min can be set to 0, and the value of max can be set to infinity, this embodiment does not To do this, the purpose of setting ⁇ 11101,11 ⁇ > is to prevent the cur-ratio from being too large or too small.
- Prev _ ratio ⁇ _ i ac _ Ccf (n) I ⁇ c _ Ccf (n) , ,
- prev-ratio can be made to ⁇ min,max>" ⁇ j I , and its ⁇ 11101,11 ⁇ > has the same range of cur-ratio, and will not be described here. Calculating a weighting coefficient " 2 according to the obtained cur-ratio and prev-ratio;
- Step 602 determining whether the first delay and the second delay are equal, and if so, proceeding to step 604, if not, entering the step 603.
- the step determines whether the first delay and the second delay are equal according to the first delay and the second delay, and proceeds to different steps according to the judgment result.
- Step 603 the weighting coefficient "2" determined in step 601 is decreased.
- This step may be to multiply the weighting coefficient "2" determined in step 601 by an adjustment coefficient greater than zero and less than one.
- the adjustment factor can be set directly according to experience; or, different adjustment factors are selected according to the maximum value of the long-term cumulative mutual closure function.
- Step 604 maintaining the weighting coefficient "2 unchanged.
- the third embodiment has the same effect as the technical solution of the second embodiment, and the sound field information of the cumulative cross-correlation function can be simultaneously referred to.
- FIG. 7 is a flow chart of a method for detecting signal delay according to Embodiment 4 of the present invention.
- the fourth embodiment differs from the second embodiment mainly in the process of detecting the effectiveness of delay variations of different channel signals.
- Steps 701-704 are the same as those described in steps 201-204 in the second embodiment.
- Step 705 Detect the validity of the delay variation of different channel signals.
- FIG. 8 is a delay variation of signals of different channels in the fourth embodiment of the present invention.
- Step 801 Acquire an average value ave of the long-term cumulative cross-correlation function, a maximum peak, and a second delay corresponding to the maximum value.
- Step 802 Determine a threshold value peakO, and calculate a value of a long-term cumulative cross-correlation function that exceeds a threshold value of peakO.
- a threshold value peak0 can be determined based on the average value ave and the maximum peak of the long-term cumulative cross-correlation function. Then, the value of the statistical long-term cumulative cross-correlation function exceeds the threshold value of peakO count;
- Step 803 Obtain a difference Diff between a delay of the left and right channel signals of the last output and a second delay.
- Step 804 When the difference Diff is less than the first threshold T1, increase the count by, for example, adding 1. When the difference Diff is greater than the second threshold T2, the count is decreased by, for example, minus one.
- Step 805 Determine, according to count and peak, whether the second delay is valid.
- a first threshold associated with count may be set, and a second threshold associated with peak, the first threshold and the second threshold may be empirically valued. If peak is greater than the second threshold and count is less than the first threshold, it is determined that the second delay is valid, is a stable delay, and can be output for subsequent synchronization adjustment processing of the left and right channel signals.
- FIG. 8 is a diagram showing the signal tracking waveform for detecting the effectiveness of the delay variation in the fourth embodiment of the present invention.
- the waveform a is a signal tracking diagram of the prior art
- the waveform b is a signal tracking diagram of the embodiment of the present invention.
- the technical solution of the embodiment of the present invention obtains the difference Diff between the delay of the left and right channel signals outputted last time and the second delay, according to the difference Diff and the first threshold and the second
- the comparison of the thresholds adjusts the count so that it is more accurate to judge whether the second delay is valid according to count and peak, and avoid excessive delays in the output delay.
- FIG. 10 is a schematic diagram showing the structure of a detecting device according to an embodiment of the present invention.
- the detecting means includes: an obtaining unit 1001, a first delay processing unit 1002, an adjusting unit 1003, and a second delay processing unit 1004.
- the obtaining unit 1001 is configured to acquire a first cumulative mutual function according to a cross-correlation function between the acquired channel signals;
- a first delay processing unit 1002 configured to determine a first delay between channel signals corresponding to the first cumulative cross-correlation function
- the adjusting unit 1003 is configured to adjust a second cumulative cross-correlation function according to a relationship between the first delay and the second delay between the channel signals, where the second delay is obtained when the second cumulative cross-correlation function is adjusted
- the first determination value of the second delay is determined according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function
- the second delay processing unit 1004 is configured to determine that the second delay corresponding to the adjusted second cumulative cross-correlation function is a delay between the detected channel signals.
- FIG. 11 is a schematic diagram showing the structure of the detecting device according to the embodiment of the present invention.
- the adjusting unit 1003 of the detecting apparatus further includes: a first weighting processing unit 1101, a second weighting processing unit 1102, and an updating unit 1103.
- the first weighting processing unit 1101 is configured to obtain an initial value of a second weighting coefficient of the second cumulative cross-correlation function
- a second weighting processing unit 1102 configured to: when determining that the first delay and the second delay between the channel signals are not equal, reduce an initial value of the second weighting coefficient to obtain a reduced Value
- the updating unit 1103 updates the second cumulative cross-correlation function according to the value of the reduced second weighting coefficient.
- a first weighting processing unit 1101 configured to set a value of a second weighting coefficient of the second cumulative cross-correlation function according to the sound field information of the first cumulative cross-correlation function
- a second weighting processing unit 1102 configured to determine a first delay between the channel signals and the When the second delays are not equal, the value of the set second weighting coefficient is decreased to obtain a reduced value; and the updating unit 1103 is configured to update the location according to the value of the reduced second weighting coefficient.
- the second cumulative cross-correlation function is described.
- the first weighting processing unit 1101 may include: a first value determining unit 1201, a second value determining unit 1202, and a value processing unit 1203.
- the first value determining unit 1201 is configured to determine a ratio or a difference between a sum of a current frame cross-correlation function with a delay greater than or equal to 0 and a sum of a current frame cross-correlation function with a delay less than or equal to 0, as a first value;
- the unit 1202 is configured to determine a ratio or a difference between a sum of a first cumulative cross-correlation function having a delay greater than or equal to 0 and a sum of a first cumulative cross-correlation function having a delay less than or equal to 0 as a second value;
- the numerical processing unit 1203 The absolute value of the difference between the first value and the second value is determined to be a value of the second weighting coefficient of the second cumulative cross-correlation function.
- the detecting device may further include: a stability detecting unit 1005.
- the stability detecting unit 1005 may include: a third value determining unit 1301, a fourth value determining unit 1302, a fourth value determining unit 1302, a value adjusting unit 1303, and a validity determining unit 1304.
- a third value determining unit 1301, configured to determine a number of the second cumulative cross-correlation function that exceeds a threshold value as a third value
- a fourth value determining unit 1302, configured to determine a difference between the delayed channel signal and the second delay as a fourth value
- the value adjustment unit 1303 is configured to adjust the third value according to a comparison relationship between the fourth value and the preset first threshold and the second value;
- the validity determining unit 1304 is configured to compare the relationship between the value of the adjusted third value and the corresponding threshold value and the value of the second cumulative cross-correlation function and the corresponding gate P ⁇ value , determining the validity of the second delay.
- FIG. 12 is a schematic structural diagram of an encoder according to an embodiment of the present invention.
- the encoder includes: a signal acquisition device 121 and a detection device 122.
- a signal acquisition device 121 configured to acquire a channel signal
- the detecting device 122 is configured to: acquire a first cumulative cross-correlation function according to a cross-correlation function between the channel signals; determine a first delay between the channel signals corresponding to the first cumulative cross-correlation function; The relationship between the first delay and the second delay adjusts a second cumulative cross-correlation function, the second The delay is obtained when the second cumulative cross-correlation function is adjusted and the first determined value of the second delay is determined according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function; determining the adjusted second cumulative mutual The second delay corresponding to the correlation function is the delay between the detected channel signals.
- the detecting device 122 has the structure described in FIG. 10 or 11, and is specifically referred to the foregoing description, and details are not described herein again.
- the technical solution of the embodiment of the present invention obtains a first cumulative cross-correlation function according to a cross-correlation function between channel signals; and determines a first delay between channel signals corresponding to the first cumulative cross-correlation function; A relationship of a first delay and a second delay between the channel signals adjusts a second cumulative cross-correlation function, the second delay being obtained when the second cumulative cross-correlation function is adjusted and the first determination of the second delay The value is determined according to an initial value of the second weighting coefficient of the second cumulative cross-correlation function; after adjusting the second cumulative cross-correlation function, determining that the corresponding second delay is a delay between the detected channel signals, The determined delay can reflect the change of the positive and negative of the delay of the channel signal, thereby improving the accuracy of the detected signal delay.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Stereophonic System (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09844241A EP2429218A4 (en) | 2009-05-07 | 2009-05-07 | DETECTION SIGNAL DELAY METHOD, SENSOR DEVICE AND ENCODER |
| PCT/CN2009/071669 WO2010127489A1 (zh) | 2009-05-07 | 2009-05-07 | 检测信号延迟的方法、检测装置及编码器 |
| KR1020117028739A KR101373594B1 (ko) | 2009-05-07 | 2009-05-07 | 신호 지연 검출 방법, 검출 장치 및 코더 |
| CN2009801547910A CN102301748B (zh) | 2009-05-07 | 2009-05-07 | 检测信号延迟的方法、检测装置及编码器 |
| US13/290,809 US20120053714A1 (en) | 2009-05-07 | 2011-11-07 | Signal delay detection method, detection apparatus, coder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/071669 WO2010127489A1 (zh) | 2009-05-07 | 2009-05-07 | 检测信号延迟的方法、检测装置及编码器 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/290,809 Continuation US20120053714A1 (en) | 2009-05-07 | 2011-11-07 | Signal delay detection method, detection apparatus, coder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010127489A1 true WO2010127489A1 (zh) | 2010-11-11 |
Family
ID=43049908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2009/071669 Ceased WO2010127489A1 (zh) | 2009-05-07 | 2009-05-07 | 检测信号延迟的方法、检测装置及编码器 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120053714A1 (zh) |
| EP (1) | EP2429218A4 (zh) |
| KR (1) | KR101373594B1 (zh) |
| CN (1) | CN102301748B (zh) |
| WO (1) | WO2010127489A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111095404A (zh) * | 2017-09-11 | 2020-05-01 | 高通股份有限公司 | 时间偏移估计 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2395504B1 (en) * | 2009-02-13 | 2013-09-18 | Huawei Technologies Co., Ltd. | Stereo encoding method and apparatus |
| CN105448312B (zh) | 2014-06-12 | 2019-02-19 | 华为技术有限公司 | 音频同步播放方法、装置及系统 |
| US10074373B2 (en) * | 2015-12-21 | 2018-09-11 | Qualcomm Incorporated | Channel adjustment for inter-frame temporal shift variations |
| US10872611B2 (en) * | 2017-09-12 | 2020-12-22 | Qualcomm Incorporated | Selecting channel adjustment method for inter-frame temporal shift variations |
| CN114726727A (zh) * | 2020-12-21 | 2022-07-08 | 深圳市中兴微电子技术有限公司 | 一种时延调整方法、装置、存储介质及电子装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0255431A (ja) * | 1988-08-19 | 1990-02-23 | Matsushita Electric Ind Co Ltd | 情報伝送装置 |
| US6035045A (en) * | 1996-10-22 | 2000-03-07 | Kabushiki Kaisha Kawai Gakki Seisakusho | Sound image localization method and apparatus, delay amount control apparatus, and sound image control apparatus with using delay amount control apparatus |
| CN1867208A (zh) * | 2005-05-18 | 2006-11-22 | 索尼株式会社 | 音频再现设备 |
| JP2007079483A (ja) * | 2005-09-16 | 2007-03-29 | Nippon Telegr & Teleph Corp <Ntt> | ステレオ信号符号化装置、ステレオ信号復号化装置、ステレオ信号符号化方法、ステレオ信号復号化方法、プログラム及び記録媒体 |
| CN1961511A (zh) * | 2004-06-02 | 2007-05-09 | 松下电器产业株式会社 | 声音数据发送/接收装置及声音数据发送/接收方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4890065A (en) * | 1987-03-26 | 1989-12-26 | Howe Technologies Corporation | Relative time delay correction system utilizing window of zero correction |
| US6408327B1 (en) * | 1998-12-22 | 2002-06-18 | Nortel Networks Limited | Synthetic stereo conferencing over LAN/WAN |
| US6973184B1 (en) * | 2000-07-11 | 2005-12-06 | Cisco Technology, Inc. | System and method for stereo conferencing over low-bandwidth links |
| WO2002078388A2 (en) * | 2001-03-27 | 2002-10-03 | 1... Limited | Method and apparatus to create a sound field |
| KR20050075254A (ko) * | 2004-01-16 | 2005-07-20 | 현대모비스 주식회사 | 음성 신호 딜레이 장치 및 그 검출 방법 |
| US7180537B2 (en) * | 2004-02-18 | 2007-02-20 | Tektronix, Inc. | Relative channel delay measurement |
-
2009
- 2009-05-07 CN CN2009801547910A patent/CN102301748B/zh not_active Expired - Fee Related
- 2009-05-07 WO PCT/CN2009/071669 patent/WO2010127489A1/zh not_active Ceased
- 2009-05-07 KR KR1020117028739A patent/KR101373594B1/ko not_active Expired - Fee Related
- 2009-05-07 EP EP09844241A patent/EP2429218A4/en not_active Ceased
-
2011
- 2011-11-07 US US13/290,809 patent/US20120053714A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0255431A (ja) * | 1988-08-19 | 1990-02-23 | Matsushita Electric Ind Co Ltd | 情報伝送装置 |
| US6035045A (en) * | 1996-10-22 | 2000-03-07 | Kabushiki Kaisha Kawai Gakki Seisakusho | Sound image localization method and apparatus, delay amount control apparatus, and sound image control apparatus with using delay amount control apparatus |
| CN1961511A (zh) * | 2004-06-02 | 2007-05-09 | 松下电器产业株式会社 | 声音数据发送/接收装置及声音数据发送/接收方法 |
| CN1867208A (zh) * | 2005-05-18 | 2006-11-22 | 索尼株式会社 | 音频再现设备 |
| JP2007079483A (ja) * | 2005-09-16 | 2007-03-29 | Nippon Telegr & Teleph Corp <Ntt> | ステレオ信号符号化装置、ステレオ信号復号化装置、ステレオ信号符号化方法、ステレオ信号復号化方法、プログラム及び記録媒体 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111095404A (zh) * | 2017-09-11 | 2020-05-01 | 高通股份有限公司 | 时间偏移估计 |
| CN111095404B (zh) * | 2017-09-11 | 2021-12-17 | 高通股份有限公司 | 时间偏移估计 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102301748A (zh) | 2011-12-28 |
| US20120053714A1 (en) | 2012-03-01 |
| EP2429218A4 (en) | 2012-03-28 |
| CN102301748B (zh) | 2013-08-07 |
| KR101373594B1 (ko) | 2014-03-12 |
| EP2429218A1 (en) | 2012-03-14 |
| KR20120020147A (ko) | 2012-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7443423B2 (ja) | マルチチャネル信号の符号化方法およびエンコーダ | |
| EP2979358B1 (en) | Volume leveler controller and controlling method | |
| EP3598448B1 (en) | Apparatuses and methods for audio classifying and processing | |
| EP3232567B1 (en) | Equalizer controller and controlling method | |
| JP2021092805A (ja) | マルチチャネル信号を符号化する方法及びエンコーダ | |
| WO2010127489A1 (zh) | 检测信号延迟的方法、检测装置及编码器 | |
| JP6641027B2 (ja) | チャネル間時間差パラメータの安定性を増加させるための方法および装置 | |
| WO2008148323A1 (en) | A voice activity detecting device and method | |
| US20110246205A1 (en) | Method for detecting audio signal transient and time-scale modification based on same | |
| WO2021053264A1 (en) | Direction estimation enhancement for parametric spatial audio capture using broadband estimates | |
| CN110491411B (zh) | 结合麦克风声源角度和语音特征相似度分离说话人的方法 | |
| JP2024081674A (ja) | デュアルエンドのメディア・インテリジェンス | |
| CN101848412B (zh) | 通道间延迟估计的方法及其装置和编码器 | |
| CN112530450A (zh) | 频域中的样本精度延迟识别 | |
| WO2018234623A1 (en) | Spatial audio processing | |
| TW201016027A (en) | Tone detector and method of detecting a tone suitable for a robot | |
| CN112786065B (zh) | 声源方向的确定 | |
| CN116206619A (zh) | 语音处理方法、装置、存储介质及电子设备 | |
| CN117476029A (zh) | 确定空间音频参数 | |
| HK1244110B (zh) | 均衡器控制器和均衡器控制方法 | |
| HK40002235A (zh) | 多声道信号的编码方法和编码器 | |
| BR112019002364B1 (pt) | Método para a codificação de um sinal de múltiplos canais, codificador e meio de armazenamento que pode ser lido por computador | |
| HK1238803B (zh) | 音量校平器控制器和控制方法 | |
| HK1242852A1 (zh) | 音量校平器控制器和控制方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 200980154791.0 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09844241 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2009844241 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 20117028739 Country of ref document: KR Kind code of ref document: A |
