JPH05325421A - Disk and sound field reproducing device - Google Patents
Disk and sound field reproducing deviceInfo
- Publication number
- JPH05325421A JPH05325421A JP4136598A JP13659892A JPH05325421A JP H05325421 A JPH05325421 A JP H05325421A JP 4136598 A JP4136598 A JP 4136598A JP 13659892 A JP13659892 A JP 13659892A JP H05325421 A JPH05325421 A JP H05325421A
- Authority
- JP
- Japan
- Prior art keywords
- sound source
- music signal
- position information
- unit
- channel
- 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.)
- Pending
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- Stereophonic System (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
(57)【要約】
【目的】 原音を忠実に再生するディスクおよび音場再
生装置を提供する。
【構成】 各音源ごとに音源信号と音源位置情報を記録
したディスク４と、圧縮音楽信号伸張部７，８と、音響
効果部９，１０と、音源位置情報記憶部２４と、記憶部
２４と伸張部７，８とを選択する切替部６と、聴取位置
情報を設定する入力部１，記録部３と、聴取位置情報お
よび各音源位置情報から各音源信号の時間遅れ要素と減
衰量を算出し音響効果部９，１０に設定する制御部２を
備える。
(57) [Abstract] [Purpose] To provide a disc and a sound field reproducing device for reproducing the original sound faithfully. [Structure] A disk 4 in which a sound source signal and sound source position information are recorded for each sound source, compressed music signal decompression units 7 and 8, acoustic effect units 9 and 10, a sound source position information storage unit 24, and a storage unit 24. A switching unit 6 for selecting the decompression units 7 and 8, an input unit 1 and a recording unit 3 for setting listening position information, and a time delay element and an attenuation amount of each sound source signal from the listening position information and each sound source position information. The control unit 2 is provided for setting the sound effect units 9 and 10.
Description
【０００１】[0001]
【産業上の利用分野】音楽信号を音源信号情報と、音源
位置情報に区別して記録したディスクおよびそのディス
クから原音に忠実な音場を再生する音場再生装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc in which a music signal is recorded by discriminating between sound source signal information and sound source position information, and a sound field reproducing device for reproducing a sound field faithful to an original sound from the disc.
【０００２】[0002]
【従来の技術】ステレオ再生装置では、左右の音を区別
して記録し、それを再生している。2. Description of the Related Art In a stereo reproduction apparatus, left and right sounds are recorded separately and reproduced.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、左右の
音だけでは、聴取者の聴取位置の変化に対応して、音像
の位置を変化させることは困難で、サラウンドプロセッ
サに代表される音場再生装置においても、実際の音源位
置を正確に識別することはできないため、忠実な音響効
果を得ることは不可能であった。However, it is difficult to change the position of the sound image in response to the change in the listening position of the listener with only the left and right sounds, and the sound field reproducing device represented by the surround processor. However, since it is not possible to accurately identify the actual sound source position, it has been impossible to obtain a faithful sound effect.
【０００４】本発明は上記課題を解決するもので、忠実
な音響効果が得られるディスクと、その音場再生装置の
提供を目的とする。The present invention solves the above problems, and an object of the present invention is to provide a disc capable of obtaining a faithful acoustic effect and a sound field reproducing apparatus therefor.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的を達
成するために、ＣＤ−Ｉディスクに代表される音楽信号
をインタリーブして並列に複数チャネルに記録し、さら
にデータも区別して記録することが可能な媒体を利用し
て、記録すべきすべての音源について、それぞれ音源信
号情報と音源位置情報を記録しておき、再生時に聴取者
の聴取位置情報と音源位置情報から減衰量と時間遅れ要
素を算出して音源信号に与える構成を有する。In order to achieve the above object, the present invention interleaves music signals typified by a CD-I disk and records them in parallel on a plurality of channels, and also records data separately. Sound source signal information and sound source position information are recorded for all sound sources to be recorded using a recordable medium, and the amount of attenuation and time delay are based on the listener's listening position information and sound source position information during playback. It has a configuration in which elements are calculated and given to a sound source signal.
【０００６】[0006]
【作用】本発明は、上記した構成によって、再生時の聴
取者の位置での音楽信号を忠実に再現するように作用す
る。With the above-described structure, the present invention acts to faithfully reproduce the music signal at the listener's position during reproduction.
【０００７】[0007]
【実施例】本発明の一実施例を図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
【０００８】図１は本発明の一実施例における音場再生
装置の構成例を示すブロック図である。ここで、１は設
定値入力部で、聴取者の左耳Ｘ座標１６と左耳Ｙ座標１
７と右耳Ｘ座標１８と右耳Ｙ座標１９を入力する。２は
制御部で、図２のフローチャートに従って、論理演算，
判断を行う。３は聴取位置情報記録部で、聴取左耳Ｘ座
標１６と聴取左耳Ｙ座標１７と聴取右耳Ｘ座標１８と聴
取右耳Ｙ座標１９を記録する。４はディスクで、図３の
ようにチャネル０に音源一情報ブロック２０（図４）を
記録し、チャネル１にギター演奏部圧縮音楽信号ブロッ
ク２１とチャネル２に歌唱部圧縮音楽信号ブロック２２
を記録し、チャネル３に無音ブロック２３が記録されて
いる。５はディスク４のドライブ部で、ディスク４から
制御部２の指示に従い、チャネル番号が付加された音源
位置情報ブロック２０とチャネル番号が付加された歌唱
部圧縮音楽信号ブロック２２を順次取り出す。６は切替
部で、チャネル番号に従い、ドライブ部５の出力を１チ
ャネル圧縮信号伸張部７と２チャネル圧縮信号伸張部８
と音源位置情報記憶部２４に振り分けて出力する。７は
１チャネル圧縮信号伸張部で、切替部６からのギター演
奏部圧縮音楽信号ブロック２１を伸張し１チャネル音楽
信号情報２５を出力する。８は２チャネル圧縮信号伸張
部で、切替部６からの歌唱部圧縮音楽信号ブロック２２
を伸張し２チャネル音楽信号情報２６を出力する。９は
１チャネル音響効果部で、制御部２からの１チャネル左
耳時間遅れ要素２７と１チャネル右耳時間遅れ要素２８
と１チャネル左耳減衰量２９と１チャネル右耳減衰量３
０に応じて１チャネル音楽信号情報２５に音響効果を与
え、１チャネル左音楽信号３１と１チャネル右音楽信号
３２を出力する。１０は２チャネル音響効果部で、制御
部２からの１チャネル左耳時間遅れ要素３３と２チャネ
ル右耳時間遅れ要素３４と２チャネル左耳減衰量３５と
２チャネル右耳減衰量３６に応じて２チャネル音楽信号
情報２６に音響効果を与え、２チャネル左音楽信号３７
と２チャネル右音楽信号３８を出力する。１１は左用合
成部で、１チャネル左音楽信号３１と２チャネル左音楽
信号３７を合成し左音楽信号３９を出力する。１２は右
用合成部で、１チャネル右音楽信号３２と２チャネル右
音楽信号３８を合成し右音楽信号４０を出力する。１３
は左用ディジタル・アナログ変換部で、左音楽信号３９
をアナログ信号に変換し左音電圧信号４１を出力する。
１４は右用ディジタル・アナログ変換部で、右音楽信号
４０をアナログ信号に変換し右音電圧信号４２を出力す
る。１５はヘッドホン部で、左音電圧信号４１と右音電
圧信号４２を音に変換する。FIG. 1 is a block diagram showing a configuration example of a sound field reproducing apparatus according to an embodiment of the present invention. Here, 1 is a set value input unit, and the listener's left ear X coordinate 16 and left ear Y coordinate 1
7 and the right ear X coordinate 18 and the right ear Y coordinate 19 are input. Reference numeral 2 denotes a control unit, which performs logical operation according to the flowchart of FIG.
Make a decision. A listening position information recording unit 3 records the listening left ear X coordinate 16, the listening left ear Y coordinate 17, the listening right ear X coordinate 18, and the listening right ear Y coordinate 19. Reference numeral 4 denotes a disc, which records a sound source information block 20 (FIG. 4) in channel 0 as shown in FIG. 3, a guitar playing section compressed music signal block 21 in channel 1 and a singing section compressed music signal block 22 in channel 2.
, And the silent block 23 is recorded in channel 3. Reference numeral 5 denotes a drive unit of the disc 4, which sequentially takes out a sound source position information block 20 to which a channel number is added and a singing section compressed music signal block 22 to which a channel number is added, according to an instruction from the control unit 2 from the disc 4. A switching unit 6 outputs the output of the drive unit 5 according to the channel number to a 1-channel compressed signal decompressing unit 7 and a 2-channel compressed signal decompressing unit 8.
And output to the sound source position information storage unit 24. Reference numeral 7 denotes a 1-channel compressed signal decompression unit that decompresses the guitar playing unit compressed music signal block 21 from the switching unit 6 and outputs 1-channel music signal information 25. Reference numeral 8 denotes a 2-channel compressed signal decompression unit, which is a singing unit compressed music signal block 22 from the switching unit 6.
Is expanded and the 2-channel music signal information 26 is output. Reference numeral 9 denotes a 1-channel sound effect unit, which is a 1-channel left ear time delay element 27 and a 1-channel right ear time delay element 28 from the control unit 2.
And 1-channel left ear attenuation 29 and 1-channel right ear attenuation 3
According to 0, a sound effect is given to the 1-channel music signal information 25 and a 1-channel left music signal 31 and a 1-channel right music signal 32 are output. Reference numeral 10 is a 2-channel sound effect unit, which responds to the 1-channel left ear time delay element 33, the 2-channel right ear time delay element 34, the 2-channel left ear attenuation amount 35, and the 2-channel right ear attenuation amount 36 from the control unit 2. A sound effect is given to the 2-channel music signal information 26, and the 2-channel left music signal 37
2 channel right music signal 38 is output. Reference numeral 11 denotes a left synthesizing unit that synthesizes the 1-channel left music signal 31 and the 2-channel left music signal 37 and outputs a left music signal 39. Reference numeral 12 denotes a right synthesizing unit which synthesizes the 1-channel right music signal 32 and the 2-channel right music signal 38 and outputs a right music signal 40. Thirteen
Is a digital / analog converter for the left, and the left music signal 39
Is converted into an analog signal and the left sound voltage signal 41 is output.
Reference numeral 14 denotes a right digital-analog converter which converts the right music signal 40 into an analog signal and outputs a right sound voltage signal 42. Reference numeral 15 denotes a headphone unit that converts the left sound voltage signal 41 and the right sound voltage signal 42 into sounds.
【０００９】次に、図２のフローチャートに従って各ブ
ロック相互の関係と動作を説明する。ステップ１では設
定値入力部１から左耳Ｘ座標１６と左耳Ｙ座標１７と右
耳Ｘ座標１８と右耳Ｙ座標１９を入力し、聴取位置情報
記録部３に記録する。ステップ２ではドライブ部５へ再
生の指示を与える。ステップ３ではドライブ部５からチ
ャネル番号を読み込む。ステップ４ではチャネル番号が
０かどうか判別し、チャネル番号が０の場合はステップ
７へ制御を移す。ステップ５ではチャネル番号が１かど
うか判別し、チャネル番号が１の場合はステップ１０へ
制御を移す。ステップ６ではチャネル番号が２かどうか
判別し、チャネル番号が２の場合はステップ１１へ制御
を移し、それ以外の場合はステップ３へ戻す。ステップ
７では、切替部６の出力を音源位置情報記憶部２４へ切
り替える。ステップ８では音源位置情報記憶部２４から
１チャネル音源位置Ｘ座標４３と１チャネル音源位置Ｙ
座標４４と２チャネル音源位置Ｘ座標４５と２チャネル
音源位置Ｙ座標４６を読み込み、（数１）から１チャネ
ル左耳時間遅れ要素２７を算出し、（数２）から１チャ
ネル左耳減衰量２９を算出し、（数３）から１チャネル
右耳時間遅れ要素２８を算出し、（数４）から１チャネ
ル右耳減衰量３０を算出する。さらに、（数５）から２
チャネル左耳時間遅れ要素３３を算出し、（数６）から
２チャネル左耳減衰量３５を算出し、（数７）から２チ
ャネル右耳時間遅れ要素３４を算出し、（数８）から２
チャネル右耳減衰量３６を算出する。これらの数式にお
いて、ｘLOは聴取左耳Ｘ座標１６、ｙLOは聴取左耳Ｙ座
標１７、ｘROは聴取右耳Ｘ座標１８、ｙROは聴取右耳Ｙ
座標１９、ｘ1は１チャネル音源位置Ｘ座標４３、ｙ1は
１チャネル音源位置Ｙ座標４４、ｘ2は２チャネル音源
位置Ｘ座標４５、ｙ2は２チャネル音源位置Ｙ座標４
６、そしてυは音速である。Next, the relationship and operation of each block will be described with reference to the flowchart of FIG. In step 1, the left ear X coordinate 16, the left ear Y coordinate 17, the right ear X coordinate 18, and the right ear Y coordinate 19 are input from the set value input unit 1 and recorded in the listening position information recording unit 3. In step 2, the drive unit 5 is instructed to reproduce. In step 3, the channel number is read from the drive unit 5. In step 4, it is determined whether or not the channel number is 0. If the channel number is 0, the control is transferred to step 7. In step 5, it is judged whether or not the channel number is 1, and if the channel number is 1, the control is shifted to step 10. In step 6, it is determined whether or not the channel number is 2, and if the channel number is 2, the control is moved to step 11, and otherwise the process is returned to step 3. In step 7, the output of the switching unit 6 is switched to the sound source position information storage unit 24. In step 8, the 1-channel sound source position X coordinate 43 and the 1-channel sound source position Y are read from the sound source position information storage unit 24.
The coordinate 44, the 2-channel sound source position X coordinate 45, and the 2-channel sound source position Y coordinate 46 are read, the 1-channel left ear time delay element 27 is calculated from (Equation 1), and the 1-channel left ear attenuation amount 29 is calculated from (Equation 2). Is calculated, the 1-channel right ear time delay element 28 is calculated from (Equation 3), and the 1-channel right ear attenuation amount 30 is calculated from (Equation 4). Furthermore, from (Equation 5) to 2
The channel left ear time delay element 33 is calculated, the 2-channel left ear attenuation amount 35 is calculated from (Equation 6), the 2-channel right ear time delay element 34 is calculated from (Equation 7), and the expression 2 is obtained from (Equation 8).
The channel right ear attenuation amount 36 is calculated. In these equations, x LO is the listening left ear X coordinate 16, y LO is the listening left ear Y coordinate 17, x RO is the listening right ear X coordinate 18, and y RO is the listening right ear Y coordinate.
Coordinates 19, x 1 are 1-channel sound source position X coordinates 43, y 1 are 1-channel sound source position Y coordinates 44, x 2 are 2-channel sound source position X coordinates 45, y 2 are 2-channel sound source position Y coordinates 4
6, and υ is the speed of sound.
【００１０】[0010]
【数１】 [Equation 1]
【００１１】[0011]
【数２】 [Equation 2]
【００１２】[0012]
【数３】 [Equation 3]
【００１３】[0013]
【数４】 [Equation 4]
【００１４】[0014]
【数５】 [Equation 5]
【００１５】[0015]
【数６】 [Equation 6]
【００１６】[0016]
【数７】 [Equation 7]
【００１７】[0017]
【数８】 [Equation 8]
【００１８】ステップ９では１チャネル左耳時間遅れ要
素２７と１チャネル左耳減衰量２９と１チャネル右耳時
間遅れ要素２８と１チャネル右耳減衰量３０を１チャネ
ル音響効果部９に設定し、２チャネル左耳時間遅れ要素
３３と２チャネル左右耳減衰量３５と２チャネル右耳時
間遅れ要素３４と２チャネル右耳減衰量３６を２チャネ
ル音響効果部１０に設定し、ステップ３へ戻す。ステッ
プ１０では、切替部６の出力を１チャネル圧縮音楽信号
伸張部７に切替え、ステップ３へ戻す。ステップ１１で
は、切替部６の出力を２チャネル圧縮音楽信号伸張部８
に切替え、ステップ３へ戻す。In step 9, the 1-channel left ear time delay element 27, the 1-channel left ear attenuation amount 29, the 1-channel right ear time delay element 28, and the 1-channel right ear attenuation amount 30 are set in the 1-channel sound effect section 9, The 2-channel left ear time delay element 33, the 2-channel left and right ear attenuation amount 35, the 2-channel right ear time delay element 34, and the 2-channel right ear attenuation amount 36 are set in the 2-channel acoustic effect unit 10, and the process returns to step 3. In step 10, the output of the switching unit 6 is switched to the 1-channel compressed music signal decompression unit 7, and the process returns to step 3. In step 11, the output of the switching unit 6 is set to the 2-channel compressed music signal expansion unit 8
And switch back to step 3.
【００１９】このように本実施例によると、ディスクに
音源位置情報と圧縮した音源信号情報を記録しておき、
再生時、設定値入力部で設定した聴取者の位置情報と、
ディスクに記録された音源位置情報から演算した時間遅
れ要素と減衰量を音響効果部に設定し、音楽信号情報に
音響効果を与えるので、忠実な再生ができる。As described above, according to this embodiment, the sound source position information and the compressed sound source signal information are recorded on the disc,
During playback, the location information of the listener set in the set value input section,
Since the time delay element and the attenuation amount calculated from the sound source position information recorded on the disc are set in the sound effect section to give the sound effect to the music signal information, faithful reproduction can be performed.
【００２０】[0020]
【発明の効果】以上の実施例から明らかなように本発明
によると、音楽信号を音源位置情報と音源信号情報に分
けて記録することによって、再生時の聴取者の位置にお
ける音響効果を正確に計算できるので、任意の聴取位置
における音楽信号を原音に忠実に再現し、音源位置の変
化に対応することも可能なディスクおよび音場再生装置
を提供できる。As is apparent from the above embodiments, according to the present invention, the sound signal at the position of the listener during reproduction is accurately recorded by separately recording the music signal into the sound source position information and the sound source signal information. Since the calculation can be performed, it is possible to provide a disc and a sound field reproducing device that can faithfully reproduce a music signal at an arbitrary listening position and respond to a change in a sound source position.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例における音場再生装置の構成
を示すブロック図FIG. 1 is a block diagram showing a configuration of a sound field reproducing apparatus according to an embodiment of the present invention.
【図２】同装置における制御の流れを示すフローチャー
トFIG. 2 is a flowchart showing a flow of control in the device.
【図３】本発明の一実施例におけるディスクにおけるイ
ンタリーブされた各ブロックの説明図FIG. 3 is an explanatory diagram of interleaved blocks in the disc according to the embodiment of the present invention.
【図４】同ディスクにおけるチャネル０音源位置情報ブ
ロック２０の各音源位置の記録情報を示す説明図FIG. 4 is an explanatory view showing recording information of each sound source position of a channel 0 sound source position information block 20 on the same disc.
１ 設定値入力部 ２ 制御部 ３ 聴取位置情報記録部 ４ ディスク ５ ドライブ部 ６ 切替部 ７ １チャネル圧縮信号伸張部 ８ ２チャネル圧縮信号伸張部 ９ １チャネル音響効果部 １０ ２チャネル音響効果部 １１ 左用合成部 １２ 右用合成部 ２０ 音源位置情報ブロック ２１ ギター演奏部圧縮音楽信号ブロック ２２ 歌唱部圧縮音楽信号ブロック ２４ 音源位置情報記憶部 1 set value input unit 2 control unit 3 listening position information recording unit 4 disk 5 drive unit 6 switching unit 7 1 channel compressed signal decompression unit 8 2 channel compressed signal decompression unit 9 1 channel acoustic effect unit 10 2 channel acoustic effect unit 11 for left Synthesizing unit 12 Right synthesizing unit 20 Sound source position information block 21 Guitar playing unit compressed music signal block 22 Singing unit compressed music signal block 24 Sound source position information storage unit
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｓ 7/00 Ｚ 8421−5Ｈ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H04S 7/00 Z 8421-5H
Claims (2)
音源位置情報に区別し、前記音源信号情報を圧縮しブロ
ック化してチャネル番号が付加された圧縮音楽信号ブロ
ックと、前記音源位置情報が記録されチャネル番号が付
加されたデータブロックを含んで構成されたディスク。1. A compressed music signal block in which a music signal is divided into sound source signal information and sound source position information for each sound source, and the sound source signal information is compressed into blocks and a channel number is added, and the sound source position information is A disc configured to include a data block recorded and added with a channel number.
信号ブロックとデータブロックを区別して読み込むドラ
イブ部と、前記圧縮音楽信号ブロックを伸張して音楽信
号を再生する複数の圧縮音楽信号伸張部と、前記圧縮音
楽信号ブロックまたは前記データブロックをチャネル番
号に応じて複数の前記圧縮音楽信号伸張部で再生された
情報音楽信号に時間遅れ要素と減衰量を与え左音楽信号
と右音楽信号に分割する複数の音響効果部と、前記左音
楽信号と前記右音楽信号をそれぞれ合成し合成音楽信号
を出力する合成部と、聴取位置を入力する設定値入力部
と、前記聴取位置を記録する聴取位置情報記録部と、チ
ャネル番号に応じて前記切替部の出力を前記音源位置情
報記憶部と各圧縮音楽信号伸張部へ切替え、前記聴取位
置情報記録部と前記音源位置情報記録部の各音源位置情
報記憶領域の各音源位置情報から各音源信号の前記時間
遅れ要素と前記減衰量を算出し前記複数の音響効果部に
設定する制御手段を備えた音場再生装置。2. A drive section for reading a compressed music signal block and a data block separately from the disk according to claim 1, and a plurality of compressed music signal expansion sections for expanding the compressed music signal block to reproduce a music signal. , The compressed music signal block or the data block is divided into a left music signal and a right music signal by giving a time delay element and an attenuation amount to the information music signal reproduced by the plurality of compressed music signal decompression units according to a channel number. A plurality of acoustic effect units, a synthesizing unit that synthesizes the left music signal and the right music signal and outputs a synthesized music signal, a set value input unit that inputs a listening position, and listening position information that records the listening position. The recording unit and the output of the switching unit are switched to the sound source position information storage unit and each compressed music signal decompression unit according to the channel number, and the listening position information recording unit and the listening position information recording unit Sound field reproduction including control means for calculating the time delay element and the attenuation amount of each sound source signal from each sound source position information in each sound source position information storage area of the sound source position information recording unit and setting the calculated attenuation amount in the plurality of sound effect units. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4136598A JPH05325421A (en) | 1992-05-28 | 1992-05-28 | Disk and sound field reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4136598A JPH05325421A (en) | 1992-05-28 | 1992-05-28 | Disk and sound field reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05325421A true JPH05325421A (en) | 1993-12-10 |
Family
ID=15179047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4136598A Pending JPH05325421A (en) | 1992-05-28 | 1992-05-28 | Disk and sound field reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05325421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004151229A (en) * | 2002-10-29 | 2004-05-27 | Matsushita Electric Ind Co Ltd | Audio information conversion method, video / audio format, encoder, audio information conversion program, and audio information conversion device |
-
1992
- 1992-05-28 JP JP4136598A patent/JPH05325421A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004151229A (en) * | 2002-10-29 | 2004-05-27 | Matsushita Electric Ind Co Ltd | Audio information conversion method, video / audio format, encoder, audio information conversion program, and audio information conversion device |
| US7480386B2 (en) | 2002-10-29 | 2009-01-20 | Matsushita Electric Industrial Co., Ltd. | Audio information transforming method, video/audio format, encoder, audio information transforming program, and audio information transforming device |
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