JPH04240982A - Television signal transmitter-receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a television signal transmission and reception system, and a television signal transmission and reception system that can efficiently transmit horizontal images with a different aspect ratio from the current system while maintaining compatibility with the current system. It relates to a transmitting/receiving device.

0002

2. Description of the Related Art There is a method called a letterbox method that transmits a horizontally long image with a different aspect ratio from the current method while maintaining compatibility with the current method. This is the center part of the screen with the current aspect ratio (hereinafter referred to as
The main part (abbreviated as "main part") is a horizontally elongated image with a wide aspect ratio. On the receiving side, in a wide aspect ratio receiver, the main image is expanded in the vertical direction of the screen to reproduce the wide aspect ratio image on the full screen. Furthermore, current television receivers can reproduce images with a wide aspect ratio based on the main image.

[0003] In other words, in the letterbox method, the transmitting side compresses the wide aspect ratio image in the vertical direction and transmits the wide aspect ratio image within the frame of the current aspect ratio as the main part. On the side, by stretching the main image vertically, it is possible to transmit wide aspect ratio images while maintaining compatibility with current systems.

0004

[Problems to be Solved by the Invention] In the above letterbox method, a wide aspect ratio image is transmitted in a compressed form in the main part. There is a problem in that the resolution characteristics of images that can be transmitted using this method are lower than those of the current method.

[0005] An object of the present invention is to provide a letterbox method television signal transmission/reception system and a transmission/reception device that can step-by-step improve the vertical and horizontal resolution characteristics of wide aspect ratio images. be.

[0006]

[Means for Solving the Problem] In the letterbox method, an image with a wide aspect ratio is placed in the main part within the frame of the aspect ratio of the current method. Therefore, the upper and lower regions of the screen (hereinafter abbreviated as upper and lower bar regions) are free of image signals and are empty.

Furthermore, in the current NTSC television signal, there is a region called a Fukinuki Hole in which there is no signal spectral component at a position conjugate to the color signal in the time and vertical frequency domains.

Furthermore, there is an area called an overscan area that is not displayed on the screen of the receiver.

In the present invention, in the letterbox method, these upper and lower bar portions,
By superimposing a reinforcing signal for improving vertical resolution, horizontal resolution, etc. in the overscan area, etc., the vertical and horizontal resolution characteristics can be improved step by step.

0010

[Operation] The principle of the present invention will be explained by taking as an example the case where the imaging system and display system have 525 scanning lines (the number of effective pixel scanning lines N=480), 60 frames, and sequential scanning.

On the transmitting side, a television signal is formed using the configuration shown in FIG. In order to place the wide aspect (16:9) image signal obtained from the camera 1 in the main part of the current aspect (4:3) using the letterbox method, the scanning line compressor 2 converts the effective pixel scanning line number M= 3
60 sequential scanning signal sequences. Then, the interlace conversion unit 3 performs a scanning line thinning operation,
Scan conversion is performed to the current interlaced scanning signal sequence. The vertical high frequency component νH1 lost in this sequential to interlaced scanning conversion is superimposed on the upper and lower bar regions as a reinforcement signal VH1. On the other hand, the horizontal high-frequency component μH that is lost due to the frequency band limitation of the transmission system is the first and third chrominance signal components that are conjugate with the color signal component in the f−ν frequency region of the temporal frequency f and vertical frequency ν in the main region. Fukinuki Hole in the quadrant
Frequency multiplexing is performed on e as reinforcement signal HH.

[0012] Furthermore, by calculating the difference between the signal restored by the scanning line expansion unit 8 to the sequential scanning signal sequence with the number of effective pixel scanning lines N=480 and the signal sequence of the camera 1, the scanning line of the letterbox method is calculated. The vertical high-frequency component νH2 that is lost during the compression and expansion process is superimposed on the overscan area as a reinforcement signal VH2.

The receiving side uses the configuration shown in FIG. 2 to reproduce a high-resolution, wide-aspect image. First, the separation processing unit 13 separates and extracts the main signal component VM and the superimposed reinforcement signal components HH, VH1, and VH2. These signal components are processed by the NTSC decoder section 1.
4. Perform predetermined demodulation operations in the demodulation sections 15, 17, and 19. The demodulated horizontal high-frequency component μH is added to the main signal sequence to improve the horizontal resolution.

The sequential conversion section 18 converts the main part signal sequence of interlace scanning into a signal sequence of progressive scanning (number of effective pixel scanning lines M=360). In this case, by using the vertical high-frequency component νH1, a progressive scanning signal sequence with high vertical resolution can be obtained.

Furthermore, the scanning line expansion section 8 performs scanning line expansion processing to convert the sequential scanning signal of effective pixel scanning lines M=360 into a normal sequential scanning signal sequence of effective pixel scanning lines N=480. Do this. In this case, the vertical high-frequency component ν
By using H2, increased vertical resolution can be achieved.

As described above, by using the superimposed reinforcement signal, it is possible to transmit and receive wide aspect ratio images with high resolution in the vertical and horizontal directions using a letterbox technique.

[0017] On the receiving side, image reproduction having various resolution characteristics can be realized in stages as shown in Table 1 by combining the reinforcement signals used.

Regarding the reinforcement signal to be superimposed, Fu
In the kinuki hole, the polarity of the signal component is reversed for each scanning line and each frame, and nonlinear operations such as pre-emphasis processing are performed in the upper and lower bar portions. Therefore, even when receiving with a conventional receiver, the interference caused by these reinforcement signals does not become an eyesore and poses no problem.

[0019]

[Table 1]

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the transmitting section of the present invention will be explained with reference to the block diagram shown in FIG.

The wide aspect ratio image signal series (effective pixel scanning lines 480) obtained from the camera 1 (for example, 525 scanning lines, 60 frames, sequential scanning) is processed by the scanning line compressor 2 into effective pixel scanning lines 360. Convert to a progressive scanning signal sequence. One of these signal sequences is supplied to the interlace converter 3, where it is converted into a signal sequence in the 2:1 interlaced scanning format adopted in the current system, and the NTSC encoder 4 performs modulation processing similar to the current system. Then, a signal series VM to be placed in the main section is generated. At this time, high-frequency components in the horizontal direction (for example, 4.2 MH
Luminance signal component of z or more, color difference Q of 0.5MHz or more
signal components, etc.) are extracted as horizontal high-frequency components μH by the μ-direction high-frequency extractor 5, and are subjected to a frequency shift operation by amplitude modulation in the modulator 6. A reinforcement signal HH having signal spectral components in the Fukinuki Hole in the first and third quadrants of the f-ν frequency domain is generated. This reinforcement signal HH
The multiplexing unit 11 performs frequency multiplexing on the main area.

In addition, the interlace converter 3 extracts the vertical high frequency component νH1 that is lost due to the scan conversion operation of sequential to interlace scan, and this signal component is converted in the compression and modulation unit 7 on the time axis. , rearrangement, modulation, etc. to generate the reinforcement signal VH1. This reinforcement signal VH1 is applied to the upper and lower bar areas in the multiplexer 11 using TDM (
The signals are superimposed in a format such as time division multiplexing) or FDM (frequency division multiplexing).

The other signal sequence from the scanning line compressor 2 is inversely converted into a signal sequence for sequential scanning of effective pixel scanning lines 480 in the scanning line expansion unit 8 . Then, the subtraction unit 9 extracts a difference component (corresponding to a high frequency component in the vertical direction) νH2 from the original signal sequence obtained from the camera 1. This νH2 component is lost during the process of vertical compression on the transmitting side and vertical expansion on the receiving side, since the wide aspect ratio image is placed in the main part using the letterbox method for transmission and reception. It is something that can be done. This signal component is compressed,
The modulator 10 performs processing such as time axis conversion, rearrangement, and modulation to generate the reinforcement signal VH2. This reinforcement signal is superimposed on the overscan area in the multiplexer 11.

In addition to superimposing these reinforcing signals, the multiplexing unit 11 performs processing to add signals such as a synchronization signal, a burst signal, and an identification signal for distinguishing from the current system television signal. A television signal using a letterbox method that is compatible with the standard, i.e.
EDTV signal 12 is configured.

In addition to superimposing the reinforcing signal in the form of a baseband signal as shown in FIG.
Superimposition in the form of AM is also possible. This embodiment will be explained with reference to a block diagram shown in FIG.

In this embodiment, the vertical high frequency component νH
2 is used as the reinforcement signal VH2' and is orthogonally modulated and multiplexed using the video signal carrier fc using the QAM technique. Note that the generation and superimposition of the reinforcement signals HH and VH1, and the generation of the vertical high-frequency component νH2 are the same as those in the embodiment shown in FIG. 1, and their explanation will be omitted.

The baseband television signal VS obtained from the multiplexer 11 is processed in the QAM modulator 22 by
A predetermined amplitude modulation process is performed on the video signal carrier wave fc.

On the other hand, the vertical high-frequency component νH2 undergoes processing such as time axis conversion and rearrangement in the compression/modulation section 21 to generate a reinforcement signal VH2'. This signal is Q
The AM modulation unit 22 performs amplitude modulation processing using a carrier wave having a phase orthogonal to the video signal carrier wave fc, and the video signal carrier wave fc
The signal 23 is multiplexed with the amplitude-modulated television signal.

As described above, in the present invention, the reinforcement signals HH, VH1, VH2 (VH2') are superimposed on the transmitting side, but it is not clear whether these reinforcement signals correspond to the luminance signal component or the color difference signal component, and the reinforcement thereof. Regarding where the signals are superimposed, various combinations other than the embodiments shown in FIGS. 1 and 3 are possible. Table 2 shows an example of the relationship between the components of these reinforcement signals and the superimposition positions. Note that configurations of television signals other than those in the embodiments can be easily realized by slight changes in the signal processing in the modulation section 6, compression, and modulation sections 7, 10, and 21, so explanations thereof will be omitted.

[0030]

[Table 2]

Next, the configuration of each block on the transmitting side shown in FIGS. 1 and 3 will be explained using an embodiment.

FIG. 4 shows an embodiment of the scanning line compressor 2. As shown in FIG. Generating signals corresponding to scanning lines a, b, and c by weightedly adding coefficients ki to the signals of each scanning line A, B, C, and D of a sequential scanning input signal series with an effective pixel scanning line number of 480, It is converted into a sequential scanning signal sequence with an effective pixel scanning line count of 360.

The input signal and the signal delayed by one line by the one-line delay circuit 23 are weighted by coefficients k1 and k2 in the coefficient multiplication circuit 24, respectively, and these are added in the adder 26 to form the scanning line a. , b, c. The coefficient generation circuit 25 generates each scanning line a, b,
Coefficient values k1 and k2 necessary for generating c are generated.

The generated signal series of scanning lines a, b, and c are written into the memory circuit 27. Then, by reading out the signal series from the memory circuit 27 during a period corresponding to the area of the main part, conversion to a sequential scanning signal system with an effective pixel scanning line count of 360 is realized. Note that the memory circuit 27
Various control signals necessary for the operation are generated by the memory control circuit 28.

Next, one embodiment of the scanning line extension section 8 is shown in FIG. The configuration is the same as that of the previous scanning line compression section, and coefficients ki are added to the signal sequences of scanning lines a, b, and c of 360 effective pixel scanning lines.
are weighted and added to obtain 480 effective pixel scanning lines A and B.
, C, and D are generated.

For the input signal and the signal delayed by one line by the one line delay circuit 29, the coefficient generation circuit 30
The coefficients k3 and k4 generated in step 1 are weighted by a coefficient multiplication circuit 24, and added by an adder 26 to generate signal sequences corresponding to scanning lines A, B, C, and D, and are written into the memory circuit 31. Then, a read operation is performed from the memory circuit 31 during a period corresponding to the area of effective pixel scanning lines (480 lines), and 4
A sequential scanning signal sequence of 80 lines is generated. Note that the memory control circuit 32 generates various control signals necessary for the operation of the memory circuit 31.

Next, FIG. 6 is an explanatory diagram of the operation of one embodiment of the interlace conversion section 3, and FIG. 7 shows its configuration. In this embodiment, as shown in FIG. 6, the odd-numbered scanning line series (scanning lines indicated by 1, 3, and 5 in the figure), the even-numbered scanning line series (2 , 4, and 6), signal sequences of the first and second field scanning lines of the interlaced scanning system are generated, respectively.

As shown in FIG. 7, this conversion from sequential to interlaced scanning is realized by a memory circuit 33. That is, the signals L1, L3, L5, . . . of the odd numbered scanning lines of the sequential scanning signal series Vp are written into the memory circuit 33 by the WT control signal generated by the memory control circuit 34. On the other hand, a read operation is performed from the memory circuit 33 in response to an RD control signal whose cycle is one scanning line period of interlaced scanning, and
Generate L1, L3, L5, and L7 signal sequences corresponding to the fields. Note that during the second field period of interlaced scanning, writing and reading operations to and from the memory circuit 33 are performed for signals of even-numbered scanning lines of the sequential scanning signal series. Then, an interlaced scanning signal sequence VI as shown in FIG. 6 is generated.

In addition, in this interlaced conversion section, the vertical high frequency component νH1 that is lost in the process of sequential to interlaced scanning conversion is processed by the 1-line delay circuit 29 and the extraction circuit 3.
Extract by 5. That is, the signal series Vp and the signal delayed by one line by the one line delay circuit 29 are input to the extraction circuit 35, and the difference signal between the two, for example, in the first field, L2-L1, L4-L3, . . . In the field, L3-L2, L5-L4, . . . are extracted as high-frequency components νH1.

Next, FIGS. 8 and 9 show an operation explanatory diagram and a configuration of another embodiment of the interlace converter 3. In this embodiment, a signal sequence for interlaced scanning is generated from a signal sequence for one frame obtained by sequential scanning. That is, as shown in FIG. 8, from the signal of the odd-numbered scanning line of one signal sequence of sequential scanning, the signal sequence of the first field of interlaced scanning and the signal of the even-numbered scanning line of interlaced scanning are A second field signal sequence is generated.

Also in this embodiment, as shown in FIG. 9, the memory circuit 36 and the memory control circuit 37
This scan conversion is realized. That is, one frame of signals of the progressive scanning signal series Vp is written into the memory circuit 36 by the WT control signal of the memory control circuit 37. On the other hand, in the read operation from the memory circuit 36, odd numbered signal sequences L1, L3, L5, . . . during the first field period of the interlaced scanning system, and even numbered signal sequences L2, L4, By reading in the order of L6, . . . , an interlaced scanning signal sequence VI is generated.

Further, information lost during the sequential to interlaced scanning process is extracted by a one-frame delay circuit 38 and an extraction circuit 39. That is, the progressive scanning signal series Vp and the signal series delayed by one frame by the one frame delay circuit 38 are input to the extraction circuit 39. The extraction circuit 39 extracts these difference signals La−Lad (
(corresponding to the difference signal between frames in a progressive scanning system) is the signal νH
Extract as 1.

Next, an embodiment of the compression and modulation sections 7 and 10 is shown in FIG. In this embodiment, reinforcement signals VH1 and VH2 are generated in a time division multiplexed manner.

The input signal νH1 (νH2) is band-limited in the low-pass filter circuit 40 so that its horizontal frequency band becomes a band of 1/m. Then, the downsampling circuit 41 thins out the sample points to generate a signal sequence subsampled to 1/m. These subsampled signal sequences are then written into the memory circuit 42.

On the other hand, reading from the memory circuit 42 is as follows:
This is carried out in a period corresponding to the region where the reinforcement signal is superimposed, and a signal sequence whose time axis is compressed by m times is generated. That is,
The signal sequence corresponding to νH1 is the period of the upper and lower bar regions, νH
The signal series corresponding to No. 2 is read out from the memory circuit 42 during a period corresponding to the overscan area. Further, control signals necessary for the operation of the memory circuit 42 are generated in the memory control circuit 43.

The pre-emphasis circuit 44 is, for example, shown in FIG.
A reinforcing signal sequence VH in which the low-level amplitude value is expanded with the characteristics shown in 1, making it less susceptible to the effects of noise in the transmission system.
1 (VH2).

Note that for the signal νH1, m is set to about 2 to 3, and the VH1 signal is configured such that νH1 signals corresponding to m lines are time-division multiplexed in one scanning line period. Further, in some cases, the pre-emphasis process may be omitted.

On the other hand, it is also possible to implement the compression and modulation section in the form of frequency division multiplexing, but in this case as well, it can be easily implemented using conventional techniques, so a description of the configuration etc. will be omitted.

Next, an embodiment of the modulation section 6 is shown in FIG. The horizontal high-frequency component μH is subjected to carrier suppression amplitude modulation in the modulation circuit 46 using the subcarrier μ0 generated by the subcarrier generation circuit 45. Then, a bandpass filter circuit 47 extracts components in a predetermined frequency band as a reinforcement signal HH.

As shown in FIG. 13, the phase of the subcarrier μ0 is controlled so that the phase is inverted for each scanning line and the points of the same phase are lowered for each field. A setting spectrum can be placed at the position of the Fukinuki Hole.

This concludes the explanation of the transmitting section of the present invention, and next, one embodiment of the receiving section of the present invention will be explained with reference to the block diagram shown in FIG. 2.

EDT of the letterbox method according to the invention
The V signal 12 is input to the separation processing unit 13, and is processed as a signal VM of the main area, a reinforcement signal VH1 of the upper and lower bar areas, VH2 of the overscan area, and a signal VM of the main area.
Each component of the reinforcement signal HH in the region le is separated and extracted.

The signal VM is supplied to the NTSC decoder section 14, where it undergoes demodulation processing in the same manner as in the current system, and is demodulated into a signal sequence of a luminance signal and a color difference signal.

Furthermore, the demodulating section 15 demodulates the horizontal high-frequency component μH by performing synchronous detection using the subcarrier μ0. This signal is added to the main signal component in an adder 16 to generate a signal sequence with high horizontal resolution.

On the other hand, the reinforcing signals VH1 and VH2 are subjected to operations such as expanding the time axis by m times and rearranging the time series in the demodulation units 17 and 19, and are demodulated to the normal positions to produce vertical high-frequency components νH1. , νH2.

The sequential conversion unit 18 converts the signal sequence of the main part of interlaced scanning and the vertical high frequency component νH1.
Based on this, a sequential scanning signal sequence with an effective pixel scanning line number of 360 is generated.

In addition, the scanning line expansion section 8 performs scanning line number conversion based on this signal sequence and the vertical high frequency component νH2, so that the effective pixel scanning line number is 480 and the horizontal and vertical Generates a wide aspect ratio image signal with high directional resolution.

Next, each block of the receiving section shown in FIG. 2 will be explained using an embodiment.

FIG. 14 shows an embodiment of the demodulator 15. The reinforcement signal HH is subjected to synchronous detection using the subcarrier μ0 in the synchronous detection circuit 49, and is then sent to the high-pass filter circuit 50.
By separating and extracting the high frequency component, the original horizontal high frequency component μH is demodulated. Note that the subcarrier μ0 necessary for synchronous detection is generated by the subcarrier regeneration circuit 48 based on the μ0 phase information added by the transmitter.

Next, an embodiment of the demodulators 17 and 19 is shown in FIG. The reinforcement signal VH1 (VH2) is input to a de-emphasis circuit 51, which performs an amplitude compression operation with characteristics opposite to that of the transmitter, and converts it into a signal sequence with linear characteristics. This operation can reduce noise components in the transmission system. Then, it is written into the memory circuit 52. On the other hand, the signal sequence read from the memory circuit 52 at a read operation speed of 1/m of the write operation speed is input to the upsampling circuit 54, and a zero value is inserted at the sampling point indicated by the symbol * in the figure. An upsampling operation is performed. Then, this signal sequence with zero values inserted is input to the low-pass filter circuit 55, and as an output signal, a signal sequence whose time axis is expanded by m times and demodulated to the original high frequency component νH1 (νH2) is generated. . Note that the memory control circuit 53 generates control signals necessary for the operation of the memory circuit 52.

Next, an example of the sequential conversion section 18 is shown in FIG.
6. The interlaced scanning signal series VI and the vertical high-frequency component νH1 are added together in an adder 56, and the result is a signal series VIP of the scanning lines missed in the interlaced scanning.
generate. These VI and VIP signal sequences are then written into the memory circuit 57. On the other hand, the memory circuit 57
The signal series VA and VB read out by the read operation (operation speed twice that of the write operation) as shown in the figure are input to the selection circuit 59, and these signal series are alternately selected as its output signals. By doing so, a progressive scanning signal sequence VP is generated. Note that the memory circuit 5
A memory control circuit 58 generates control signals and the like necessary for the operation of 7.

Next, an embodiment of the scanning line extension section 8 is shown in FIG.
7. This configuration can be realized by adding a function of adding the high frequency component νH2 in the vertical direction to the transmitter shown in FIG. 5 above. That is, the effective pixel scan line 360
A coefficient ki is weighted and added to each scanning line of sequential scanning to generate a signal sequence of 480 effective scanning lines, and νH2 is added to this signal sequence by an adder 60 to improve the vertical resolution. Generate a signal sequence. Then, by writing to and reading from the memory circuit 31, the effective pixel scanning line 4
A regular sequential scanning signal sequence of 80 lines is generated.

[0063] In the receiving section, the reinforcement signals HH,
Although it is possible to improve the resolution in the horizontal and vertical directions using VH1 and VH2, it is possible to improve the resolution in the horizontal and vertical directions without using all of the reinforcement signals;
(H only, etc.), it is possible to realize image reproduction with various characteristics in stages.

In this embodiment, the present invention has been explained using a case where the camera and display have a scanning system with 525 scanning lines, 60 frames, and sequential scanning, but other scanning systems,
For example, the present invention can be applied to various scanning formats such as 1125 scanning lines, 30 frames, and interlaced scanning.

[0065]

According to the present invention, the horizontal high-frequency components and vertical high-frequency components, which are effective for improving the resolution of wide aspect images, are superimposed in the form of reinforcement signals in the transmitter, and the receiver By using these reinforcement signals in stages, it is possible to improve resolution with various characteristics, making it possible to provide high-quality, high-definition, wide-aspect image services according to viewer preferences. Become.

Furthermore, even when the television signal according to the present invention is received by a conventional receiver, a wide aspect image can be reproduced, and the interference caused by the reinforcing signal does not become an eyesore.
There is no problem.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a configuration example of a transmitter according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of a receiving section according to an embodiment of the present invention.

FIG. 3 is a block diagram showing another example of the configuration of the transmitter according to the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration example of a scanning line compression section of a transmitting section of the present invention.

FIG. 5 is a diagram showing another example of the configuration of the scanning line compression section of the transmitting section of the present invention.

FIG. 6 is an explanatory diagram of the operation of the interlace converter of the transmitter according to the embodiment of the present invention.

FIG. 7 is a diagram showing an example of the configuration of an interlace conversion section of a transmitting section according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram of the operation of the interlace converting section of the transmitting section according to the embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration example of an interlace converting section of a transmitting section according to an embodiment of the present invention.

FIG. 10 is a diagram showing an example of the configuration of a compression modulation section of a transmitting section according to an embodiment of the present invention.

FIG. 11 is a diagram showing pre-emphasis characteristics of the compression modulation section in FIG. 10;

FIG. 12 is a diagram showing an example of the configuration of a modulation section of a transmitting section according to an embodiment of the present invention.

FIG. 13 is a phase characteristic diagram of a modulating section of a transmitting section.

FIG. 14 is a block diagram showing a configuration example of a demodulation section of a reception section according to an embodiment of the present invention.

FIG. 15 is a block diagram showing another example of the configuration of the demodulating section of the receiving section according to the embodiment of the present invention.

FIG. 16 is a diagram showing an example of the configuration of a sequential conversion section of a receiving section according to an embodiment of the present invention.

FIG. 17 is a diagram showing an example of the configuration of a scanning line extension section of a receiving section according to an embodiment of the present invention.

[Explanation of symbols]

1... Camera, 2... Scanning line compression section, 3... Interlace conversion section, 4... NTSC encoder section, 5... μ direction high frequency extraction section, 6... Modulation section, 7... Compression, modulation section, 8... Scanning line expansion section Department,
9... Subtraction section, 10... Compression and modulation section, 11... Multiplexing section, 1
3... Separation processing section, 14... NTSC decoder section, 15... Demodulation section, 16... Addition section, 17... Demodulation section, 18... Sequential conversion section, 19... Demodulation section, 20... Wide aspect image signal, 2
DESCRIPTION OF SYMBOLS 1... Compression and modulation section, 22... QAM modulation section, 23... 1 line delay circuit, 24... Coefficient multiplication circuit, 25... Coefficient generation circuit, 26... Adder, 27... Memory circuit, 28... Memory control circuit, 29... 1 line delay circuit, 30...coefficient generation circuit,
31...Memory circuit, 32...Memory control circuit, 33...Memory circuit, 34...Memory control circuit, 35...Extraction circuit, 36
...Memory circuit, 37...Memory control circuit, 38...1 frame delay circuit, 39...Extraction circuit, 40...Low pass filter circuit, 41...Downsampling circuit, 42...Memory circuit, 43...Memory control circuit, 44...Pre-emphasis circuit , 45...subcarrier generation circuit, 46... modulation circuit, 47...
Bandpass filter, 48...Subcarrier generation circuit, 49...
Synchronous detection circuit, 50... High-pass filter circuit, 51... De-emphasis circuit, 52... Memory circuit, 53... Memory control circuit, 54... Up-sampling circuit, 55... Low-pass filter circuit, 56... Adder, 57... Memory circuit, 5
8...Memory control circuit, 59...Selection circuit, 60...Adder.

Claims (4)

[Claims] [Claim 1] For an image signal sequence VS1 having N effective pixel scanning lines and having a horizontally elongated aspect ratio different from the current system, the image signal sequence VS1 has an effective pixel scanning line number M (M<
N) means for generating a sequentially scanned image signal sequence VS2;
Means for converting the image signal series VS2 into an interlace scan image signal series VS3 having M effective pixel scan lines by sequential to interlace scan conversion, the image signal series VS
3, there is a means for extracting the horizontal frequency high frequency component μH that cannot be transmitted in the current television system, a means for extracting the vertical high frequency component νH1 that is lost due to sequential to interlaced scanning conversion, and a means for extracting the vertical high frequency component νH1 that is lost due to scanning line number conversion. High frequency component νH2
The image signal VS4, which is generated from the image signal series VS3 and has a signal form similar to that of the current television system, is placed in the main area by a letterbox method, and the high frequency components μH, νH1 are extracted from the image signal series VS3. , νH2 as a reinforcement signal to form a television signal,
In the receiving section, using the image signal VS4 and the reinforcement signal, the image signal VS4 is demodulated, interlaced to progressive scanning conversion processing, and scan line number inverse conversion processing is performed, and an image signal sequence with a horizontally long aspect ratio is obtained. A television signal transmitting and receiving device characterized by reproducing. [Claim 2] In the superimposition of the reinforcement signal, at least the horizontal frequency high frequency component μH is
2. The television signal transmitting/receiving apparatus according to claim 1, wherein the vertical high frequency component νH1 in the region of ole is arranged in the region of the upper and lower bar portions. 3. The television signal transmitting/receiving apparatus according to claim 1, wherein the receiving section reproduces an image signal series having a horizontally long aspect ratio using the selectively acquired reinforcement signal. [Claim 4] Fuki
2. The television signal transmitting/receiving device according to claim 1, wherein the television signal transmitting/receiving device uses a region including a nuki hole, an upper and lower bar portion, an overscan region, a QAM using a video signal carrier wave, or a combination thereof.