公开(公告)号：DE69829242T2

公开(公告)日：2006-02-09

申请号：DE69829242

申请日：1998-05-11

Applicant: SONY CORP

Inventor： SHIMOYOSHI OSAMU ,  TSUTSUI KYOYA

IPC: C08L67/02 ,  G11B20/00 ,  H03M7/30 ,  H04B1/66 ,  H04S1/00

Abstract: An information recording apparatus which, while enabling reproduction by an old standard accommodating reproducing device, reduces the effect of the quantization error produced on decoding at the time of encoding and decoding which realizes a multiple channel system by new standard expansion. The apparatus includes an adaptive channel conversion circuit for multiplying signals of a L or R channel with a first coefficient, multiplying signals of the other channel with a second coefficient, mixing signals of the channel multiplied with the first coefficient with signals of the channel multiplied with the second coefficient for each of the L and R channels, and for generating (L+R)/2 and (L-R)/2 from the L and R channels existing after the channel mixing. The apparatus also includes a first encoding circuit for encoding (L+R)/2 with A-codec and a second encoding circuit for encoding (L-R)/2 signal with B-codec.

公开(公告)号：DE60020663T2

公开(公告)日：2005-12-01

申请号：DE60020663

申请日：2000-12-08

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  HONMA HIROYUKI ,  SHIMOYOSHI OSAMU ,  MIYAZAKI SATOSHI

IPC: G10L19/02 ,  G10L19/00 ,  G10L19/14 ,  H03M7/30

Abstract: The first codec-based dummy string generator 132 generates a first codec-based dummy string in a first code string conforming to a first format based on the first coding method. The second codec encoder 131 generates a second code string having been encoded with a higher efficiency than the first code string and conforming to a second format different from the first format. The code string generator 133 generates a synthetic code string by embedding the second codec-based code string generated by the second codec encode block 131 in a blank area formed in the first code string based on the first codec-based dummy string generated by the first code dummy string generator 132.

公开(公告)号：DE69534140D1

公开(公告)日：2005-05-19

申请号：DE69534140

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

Abstract: In a method and device for signal encoding according to this invention, a first encoder (124) separately encodes noise components of a plurality of channels and a second encoder (125) commonly encodes noise components of a plurality of channels. Then a discriminating means (123) detects the characteristics of the noise components and selects the output from either of the encoders (124 and 125) based on the discriminated results. When the noise components the compression ratio of the noise components of a plurality of channels can be increased. When the components are not commonly encoded, on the other hand, undesired effects of common encoding can be prevented.

公开(公告)号：AT276607T

公开(公告)日：2004-10-15

申请号：AT95913405

申请日：1995-03-31

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  SHIMOYOSHI OSAMU ,  SONOHARA MITO

IPC: G10L25/93 ,  G11B20/10 ,  H04B1/66 ,  H03M7/30 ,  H04B14/04 ,  G10L19/02

Abstract: Input signals are converted into frequency components, the frequency components are separated into first signals composed of tonal components and second signals composed of other components. The first and second signals are respectively encoded and code string to be transmitted or recorded is generated. For example, only the first signals are encoded, and an information substring generated for, e.g., every quantization accuracy information which has a common value and a parameter related to the encoding of the first signals is included in the code string, by using at least either, for example, the number of spectrum components constituting the tonal components which is the parameter related to the separation or, for example, quantization accuracy information which is the parameter related to the encoding of the first signals as reference parameter. Thus, the inputted signals can be encoded more efficiently than conventional.

公开(公告)号：FI112979B

公开(公告)日：2004-02-13

申请号：FI925401

申请日：1992-11-27

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  SHIMOYOSHI OSAMU

IPC: G10L19/02 ,  G11B20/00 ,  G11B20/10 ,  H03M13/00 ,  H04B1/66

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.

公开(公告)号：IN190031B

公开(公告)日：2003-05-31

申请号：IN586DE1995

申请日：1995-03-30

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  SHIMOYOSHI OSAMU ,  SONOHARA MITO

IPC: G09C1/00

公开(公告)号：PL184295B1

公开(公告)日：2002-09-30

申请号：PL31294795

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 ,  G10L21/02 ,  H03M7/30 ,  H04B14/04

Abstract: In a method and device for signal encoding according to this invention, a first encoder (124) separately encodes noise components of a plurality of channels and a second encoder (125) commonly encodes noise components of a plurality of channels. Then a discriminating means (123) detects the characteristics of the noise components and selects the output from either of the encoders (124 and 125) based on the discriminated results. When the noise components the compression ratio of the noise components of a plurality of channels can be increased. When the components are not commonly encoded, on the other hand, undesired effects of common encoding can be prevented.

公开(公告)号：DE69431025D1

公开(公告)日：2002-08-29

申请号：DE69431025

申请日：1994-09-22

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA

IPC: G10L19/02 ,  G11B20/00 ,  H04B1/66

Abstract: A method and an apparatus for encoding an input signal including the steps of breaking down (601) the input signal into frequency components, separating (602) the frequency components into a first signal made up of a plurality of tonal components and a second signal made up of other components, the number of the frequency components making up the tonal components being variable, encoding the first signal and encoding the second signal, are disclosed. Also disclosed are a method and an apparatus for decoding the encoded signals, and a recording medium (609) on which the encoded signals are recorded. Tonal signals may be encoded efficiently depending on the manner of distribution of their spectral energy to assure more efficient encoding on the whole. If the signals compression coded in this manner are recorded on the recording medium, the recording capacity may be employed effectively. Also, high-quality acoustic signals may be obtained on decoding signals reproduced from the recording medium (609).

公开(公告)号：DE69429499T2

公开(公告)日：2002-05-16

申请号：DE69429499

申请日：1994-05-31

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  HEDDLE ROBERT

IPC: G10L19/02 ,  G10L21/02 ,  H04B1/66 ,  H03M7/30

Abstract: This method comprises the steps of converting the inputted acoustic signals into the frequency component; separating the output of conversion means to the tone component and the other component (noise component); coding the tone component; coding the noise component; and generating the code string from the output of the coding step.

公开(公告)号：DE69429499D1

公开(公告)日：2002-01-31

申请号：DE69429499

申请日：1994-05-31

Applicant: SONY CORP

Inventor： TSUTSUI KYOYA ,  HEDDLE ROBERT

IPC: G10L19/02 ,  G10L21/02 ,  H04B1/66 ,  H03M7/30

Abstract: This method comprises the steps of converting the inputted acoustic signals into the frequency component; separating the output of conversion means to the tone component and the other component (noise component); coding the tone component; coding the noise component; and generating the code string from the output of the coding step.