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公开(公告)号：DE69635973D1
公开(公告)日：2006-05-18
申请号：DE69635973
申请日：1996-11-08
Applicant: SONY CORP
Inventor： SHIMOYOSHI OSAMU , TSUTSUI KYOYA
Abstract: Coding (2) of a high efficiency is achieved without increasing the scale of a code train transform table (1). Quantization spectra are divided into groups, and when two quantization spectra in any group are both equal to 0, they are coded (2) into 0. If the two quantization spectra are not equal to 0, the values (-2, 3) of the individual quantization spectra are coded (2) into corresponding values (1101, 1110) and 1 is added to the top of the code train (3).
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公开(公告)号：DE69533577T2
公开(公告)日：2005-10-06
申请号：DE69533577
申请日：1995-12-19
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , OIKAWA YOSHIAKI , SHIMOYOSHI OSAMU
Abstract: A method and apparatus for high efficiency encoding audio signals. The high-efficiency encoding apparatus includes a transform circuit (11; 61) for transforming an input signal into frequency components and a signal component separating circuit (62) for separating the frequency components into tonal components and noisy components. The high-efficiency encoding apparatus also includes a tonal component encoding circuit (63) for encoding tonal components and a noisy component encoding circuit (64) for encoding noisy components. The tonal components are made up only of signal components of a specified band and encoded along with the information specifying the band. The noisy components are normalized (31) and quantized (33) every pre-set encoding unit and encoded along with the quantization precision information. The information on the numbers of quantization steps of the noisy components is encoded with a smaller number of bits for the high- range side than for the low-range side. With the high-efficiency encoding method and apparatus, not only the main information but also the subsidiary information may be improved in encoding efficiency, while the degree of freedom may be assured in the method of representing the subsidiary information and satisfactory encoding may be achieved.
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公开(公告)号：CA2163371C
公开(公告)日：2005-09-20
申请号：CA2163371
申请日：1995-03-31
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , SHIMOYOSHI OSAMU , SONOHARA MITO
Abstract: According to the present invention, for encoding input signals, the input signals are transformed into frequency components, and the frequency components are separated into a first signal composed of tonal components and a second signal composed of other components. The first and second signals are encoded respectively, and code strings for transmission or recording are generated on the basis of encoded signals resulting from first and second encoding. For example, only the first signal is encoded and the code string is caused to include partial information strings grouped so as to have common values on the basis of at least one of reference parameters pertaining to the signal separation and parameters pertaining to the first encoding. Thus, more efficient encoding than in the conventional technique can be realized.
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公开(公告)号：CA2140779C
公开(公告)日：2005-09-20
申请号：CA2140779
申请日：1994-05-31
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , HEDDLE ROBERT
Abstract: A method, and the apparatus for its implementation, for encoding an input signal includes the steps of transforming an input signal into frequency components , as for example by spectrum transform processing, separating the frequency components into a first signal consisting of tone characteristic components and a second signal consisting of other components, encoding the first signal, and encoding a signal based on the second signal.
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公开(公告)号：DE69829242D1
公开(公告)日：2005-04-14
申请号：DE69829242
申请日：1998-05-11
Applicant: SONY CORP
Inventor： SHIMOYOSHI OSAMU , TSUTSUI KYOYA
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.
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Patent Agency Ranking76.发明专利
公开(公告)号：CA2088202C
公开(公告)日：2004-12-28
申请号：CA2088202
申请日：1993-01-27
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , AKAGIRI KENZO
Abstract: A data compression apparatus for compressing a digital input signal to provide a compressed digital output signal. In the apparatus, a circuit derives plural spectral coefficients from the digital input signal, and groups the spectral coefficients into bands. An adaptive bit allocation circuit adaptively allocates a number of spectrum-dependent quantizing bits among the bands to allocate to each band a number of spectrum-dependent quantizing bits for quantizing each of the spectral coefficients in the band. The number of spectrum-dependent quantizing bits allocated to each band by the adaptive bi t allocation circuit is determined according to the band magnitude, weighted depending on the band frequency.
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公开(公告)号：DE69432538T2
公开(公告)日：2004-04-01
申请号：DE69432538
申请日：1994-06-29
Applicant: SONY CORP
Inventor： SONOHARA MITO , TSUTSUI KYOYA
Abstract: A signal encoding apparatus for encoding an acoustic signal. This signal encoding apparatus includes a transform circuit for transforming an inputted acoustic signal into frequency components, a signal component separating circuit for separating an output of the transform circuit into tone characteristic components and noise characteristic components, a tone characteristic encoding circuit for encoding a signal of tone characteristic components, and a noise characteristic component encoding circuit for encoding a signal of noise characteristic components, wherein the tone characteristic component encoding circuit encodes respective signal components of the signal of tone characteristic components so that they respectively have different code lengths to thereby improve efficiency of encoding without degrading sound quality with respect to acoustic signal of tone characteristic.
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公开(公告)号：DE69527223T2
公开(公告)日：2003-03-27
申请号：DE69527223
申请日：1995-03-31
Applicant: SONY CORP
Inventor： SHIMOYOSHI OSAMU , SONOHARA MITO , TSUTSUI KYOYA
Abstract: A data encoding method and apparatus in which the volume of arithmetic-logical operations for calculating the total number of bits required for encoding for adaptive bit allocation in the variable length encoding system for expediting the processing. In the data encoding apparatus for encoding and subsequently variable length encoding the input data, spectral data obtained on orthogonal transform coding are routed to a block floating circuit (403) for normalization and re-quantized in a quantization circuit (404) depending on the bit allocation number information from a bit allocation calculating circuit (406) so as to be then variable length encoded by an encoding circuit (407) and outputted at an output terminal (408). In the bit allocation calculation circuit (406), reference is had to a table for bit number calculation (409) in which re-quantized data domain is divided at boundary points corresponding to code length transitions in order to calculate the total number of bits required for encoding for use in adjusting the numbers of allocated bits with a smaller volume of the arithmetic-logical operations.
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公开(公告)号：DE69428435T2
公开(公告)日：2002-07-11
申请号：DE69428435
申请日：1994-11-04
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA
Abstract: In an apparatus for, and a method of, encoding signals according to the present invention, a normalization coefficient for normalizing a first signal is set into a smaller interval then that of a normalization coefficient for normalizing a second signal. In other words, accuracy of the normalization coefficient at the time of normalization of a tone component is set to a higher level than that of the normalization coefficient at the time of normalization of a noise component. Accordingly, the present invention provides an efficient method of encoding. In other words, the present invention improves the accuracy of encoding of the tone component while restricting the number of bits necessary for encoding the noise component, thus improving the encoding efficiency as a whole. In the recording medium of the present invention, since signals efficiently encoded by the signal encoding apparatus or method of the present invention are recorded, a recording capacity can be effectively utilized. Further, because the signal decoder of the present invention decodes the signals encoded by the signal encoding apparatus or method of the present invention, signal error during decoding can be reduced.
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公开(公告)号：ES2165389T3
公开(公告)日：2002-03-16
申请号：ES94916433
申请日：1994-05-31
Applicant: SONY CORP
Inventor： TSUTSUI KYOYA , HEDDLE ROBERT
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.
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