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公开(公告)号：MX9600574A
公开(公告)日：1997-04-30
申请号：MX9600574
申请日：1995-06-12
Applicant: SONY CORP
Inventor： OIKAWA YOSHIAKI , TSUTSUI KYOYA , MIYAMORI SHINJI , UENO MASATOSHI
IPC: G10L19/00 , G10L19/02 , G10L19/032 , G10L19/14 , G10L25/00 , G11B20/10 , G11B20/24 , H04B1/66 , H04H5/00 , H04B14/04 , H03M07/30 , G10L07/04
Abstract: Con el método y aparato de codificacion de señales de conformidad con la presente invencion, los componentes de ruido de los canales multiples se codifican individualmente mediante una primera unidad (124) de codificacion, mientras que los componentes de ruido de los canales multiples se codifican en comun mediante una segunda unidad (125) de codificacion. Una unidad (123) de discriminacion elimina las características de los componentes de ruido de los canales multiples. Basándose en los resultados de la discriminacion, se lleva a cabo la conmutacion selectiva entre una salida de la primera unidad (124) de codificacion y una salida de la segunda unidad (125) de codificacion. Si los componentes de ruido de los canales multiples se codifican en comun, la relacion de compresion para los componentes de ruido de los canales multiples se puede mejorar. Por otra parte, si los componentes de ruido de los canales multiples no se codifican en comun se consideran perjudiciales debido al manejo en comun.
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62.发明专利
公开(公告)号：AU672729B2
公开(公告)日：1996-10-10
申请号：AU1077295
申请日：1994-11-29
Applicant: SONY CORP
Inventor： SONOHARA MITO , TSUTSUI KYOYA , HEDDLE ROBERT
IPC: H04N5/92 , G10L19/02 , G11B20/10 , H03M7/30 , H03M7/40 , H04N19/115 , H04N19/124 , H04N19/13 , H04N19/132 , H04N19/134 , H04N19/136 , H04N19/14 , H04N19/146 , H04N19/169 , H04N19/174 , H04N19/176 , H04N19/18 , H04N19/192 , H04N19/196 , H04N19/42 , H04N19/423 , H04N19/46 , H04N19/60 , H04N19/625 , H04N19/635 , H04N19/70 , H04N19/80 , H04N19/85 , H04N19/91 , G10L7/04 , G10L9/18
Abstract: An input signal is divided into blocks and converted into spectrum signals. Each of the spectrum signals are further divided into units and normalized. The normalized spectrum signals are transformed into variable-length codes and outputted together with the normalization coefficients and the number of bits of requantization. An upper limit is put on the number of bits of the outputted signals per block. If the numbers of bits of some signals blocks exceed the upper limit, the normalization coefficients of at least one of the units are forcedly changed. The signals whose normalization coefficients have been forcedly changed are requantized, entropy-coded, and outputted. Thus, without influence of the variation of the numbers of bits due to the variable-length encoding, the hardware scale can be smaller that conventional ones, and the encoding/decoding is efficient and not aurally affected.
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63.发明专利
公开(公告)号：AU1077295A
公开(公告)日：1995-06-13
申请号：AU1077295
申请日：1994-11-29
Applicant: SONY CORP
Inventor： SONOHARA MITO , TSUTSUI KYOYA , HEDDLE ROBERT
IPC: H04N5/92 , G10L19/02 , G11B20/10 , H03M7/30 , H03M7/40 , H04N19/115 , H04N19/124 , H04N19/13 , H04N19/132 , H04N19/134 , H04N19/136 , H04N19/14 , H04N19/146 , H04N19/169 , H04N19/174 , H04N19/176 , H04N19/18 , H04N19/192 , H04N19/196 , H04N19/42 , H04N19/423 , H04N19/46 , H04N19/60 , H04N19/625 , H04N19/635 , H04N19/70 , H04N19/80 , H04N19/85 , H04N19/91 , G10L7/04 , G10L9/18
Abstract: An input signal is divided into blocks and converted into spectrum signals. Each of the spectrum signals are further divided into units and normalized. The normalized spectrum signals are transformed into variable-length codes and outputted together with the normalization coefficients and the number of bits of requantization. An upper limit is put on the number of bits of the outputted signals per block. If the numbers of bits of some signals blocks exceed the upper limit, the normalization coefficients of at least one of the units are forcedly changed. The signals whose normalization coefficients have been forcedly changed are requantized, entropy-coded, and outputted. Thus, without influence of the variation of the numbers of bits due to the variable-length encoding, the hardware scale can be smaller that conventional ones, and the encoding/decoding is efficient and not aurally affected.
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64.发明专利
公开(公告)号：AU656452B2
公开(公告)日：1995-02-02
申请号：AU3195393
申请日：1993-01-21
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , AKAGIRI KENZO
Abstract: Apparatus for compressing a digital input signal, to provide a compressed digital output signal, comprises means (11-15) for deriving plural spectral coefficients from the digital input signal, and for grouping the spectral coefficients into bands, and adaptive bit allocation means (16-18) for adaptively allocating a number of signal-dependent quantizing bits among the bands to allocate to each band a number of signal-dependent quantizing bits for quantizing each spectral coefficient in the band, the number of signal-dependent quantizing bits allocated to each band being determined according to the band magnitude, weighted depending on the band frequency.
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65.发明专利
公开(公告)号：CA2088202A1
公开(公告)日：1993-07-30
申请号：CA2088202
申请日：1993-01-27
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , AKAGIRI KENZO
Abstract: An apparatus for compressing a digital input signal to provide a compressed digital output signal, comprises a means for deriving plural spectralcoefficients from the digital input signal, and for grouping the spectral coefficients into bands, each band having a band magnitude and a band frequency; and an adaptive bit allocation means for adaptively allocating a number of signaldependent quantizing bits among the bands to allocate to each band a number of signal-dependent quantizing bits for quantizing each spectral coefficient in theband, the number of signal-dependent quantizing bits allocated to each band being determined according to the band magnitude, weighted depending on the band frequency.
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Patent Agency Ranking
公开(公告)号：BR9204820A
公开(公告)日：1993-07-13
申请号：BR9204820
申请日：1992-03-27
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , SHIMOYOSHI OSAMU
Abstract: An apparatus for compressing a digital input signal compresses a digital input signal arranged into frames of plural samples. The digital input signal is orthogonally transformed by plural orthogonal transform circuits in blocks derived by dividing the frames by a different divisor in each circuit. The resulting spectral coefficients are quantized using an adaptive number of bits. The output of one orthogonal transform circuit is selected based on the outputs of the orthogonal transform circuits. The digital input signal is divided into plural frequency ranges, and frames are formed in each range. A block length decision circuit determines division of the frames of each range signal into blocks in response to range signal dynamics. The range signals are orthogonally transformed in blocks and the spectral coefficients are quantized. The apparatus also includes a frequency analyzing circuit that derives spectral data points from the input data, and groups them in plural bands. A noise level setting circuit finds the energy in each band and sets a allowable noise level in response to the band energy. A block floating coefficient calculating circuit calculates block floating coefficients based on the maximum spectral data point in each band. A quantizing bit number decision circuit determines the number of bits to use for quantizing in response to the allowable noise level and the block floating coefficients. A quantizing circuit quantizes the spectral data points in response to the quantizing bit number decision circuit.
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公开(公告)号：ZA921988B
公开(公告)日：1993-02-24
申请号：ZA921988
申请日：1992-03-18
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , KYOYA TSUTSUI , SHIMOYOSHI OSAMU , OSAMU SHIMOYOSHI
Abstract: An apparatus for compressing a digital input signal compresses a digital input signal arranged into frames of plural samples. The digital input signal is orthogonally transformed by plural orthogonal transform circuits in blocks derived by dividing the frames by a different divisor in each circuit. The resulting spectral coefficients are quantized using an adaptive number of bits. The output of one orthogonal transform circuit is selected based on the outputs of the orthogonal transform circuits. The digital input signal is divided into plural frequency ranges, and frames are formed in each range. A block length decision circuit determines division of the frames of each range signal into blocks in response to range signal dynamics. The range signals are orthogonally transformed in blocks and the spectral coefficients are quantized. The apparatus also includes a frequency analyzing circuit that derives spectral data points from the input data, and groups them in plural bands. A noise level setting circuit finds the energy in each band and sets a allowable noise level in response to the band energy. A block floating coefficient calculating circuit calculates block floating coefficients based on the maximum spectral data point in each band. A quantizing bit number decision circuit determines the number of bits to use for quantizing in response to the allowable noise level and the block floating coefficients. A quantizing circuit quantizes the spectral data points in response to the quantizing bit number decision circuit.
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公开(公告)号：CA2083713A1
公开(公告)日：1992-09-30
申请号：CA2083713
申请日：1992-03-27
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , SHIMOYOSHI OSAMU
Abstract: 2083713 9217884 PCTABS00016 Input digital data are arranged into blocks by plural samples and orthogonal transform is effected in each block to produce coefficient data, which are encoded with an adaptive number of bits. A plurality of orthogonal transform units transform the input digital data with different block lengths. Only one of outputs is selected on the basis of outputs of the orthogonal transform units. The apparatus includes a block length decision circuit for determining the block length for orthogonal transform of each band based on characteristics of block data prior to orthogonal transform of each band. Orthogonal transform of each band is effected with the block length determined by the block length decision circuit. The encoding apparatus also includes a unit for frequency analyzing input digital data, a noise level setting unit for finding energies for each block consisting of plural output data from the frequency analyzing unit and setting the tolerable noise level based on the energies on the block-by-block basis, a unit for calculating floating coefficients based on the maximum value data in each block consisting of plural output data from the frequency analyzing unit, unit for encoding outputs of the frequency analyzing unit, and an allocation bit number decision circuit for finding the number of allocated bits at the time of encoding by the encoding unit based on an output of the noise level setting unit and an output of the floating coefficient calculating unit.
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公开(公告)号：JPH0542701B2
公开(公告)日：1993-06-29
申请号：JP9281385
申请日：1985-04-30
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , KURAUCHI YOSHITAKA
IPC: G06F13/14
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公开(公告)号：DE69837738D1
公开(公告)日：2007-06-21
申请号：DE69837738
申请日：1998-03-25
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , SHIMOYOSHI OSAMU
Abstract: An encoding method and apparatus and a decoding method and apparatus in which the encoded information is decreased in volume and in which the encoding and decoding operations are performed with a smaller processing volume and a smaller buffer memory capacity. The apparatus includes a low range signal splitting circuit (261g, 261h) for separating low-range side signal components (260c,260d) from L and R channel signals (260a,260b) converted by a transform circuit into spectral signal components, and a channel synthesis circuit (261e) for synthesizing (L+R) channel signal components from the L and R channel spectral signal components (260c,260d). The apparatus also includes a high range signal separating circuit (261f) for separating the high range side signal components (260h) from the (L+R) channel signal components (260a,260b), a signal component encoding circuit (261j,261k) for compression-encoding low-range side signal components and a signal component encoding circuit (261i) for compression-encoding the normalization coefficient information obtained on normalization of the (L+R) channel high-range signal components.
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