公开(公告)号：US5519394A

公开(公告)日：1996-05-21

申请号：US278615

申请日：1994-07-21

申请人： Naoshi Matsuo ,  Naoji Fujino ,  Mitsuru Tsuboi ,  Toshiaki Nobumoto ,  Nobuhide Eguchi

发明人： Naoshi Matsuo ,  Naoji Fujino ,  Mitsuru Tsuboi ,  Toshiaki Nobumoto ,  Nobuhide Eguchi

IPC分类号： G06F5/00 ,  G10L19/00 ,  G11B20/00 ,  H03M7/00 ,  H03M7/02 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04 ,  H04L25/49 ,  H04L17/18 ,  H03M13/02 ,  H04L15/28

CPC分类号： H03M7/3082 ,  G11B20/00007

摘要： The coder generates code information A.sub.1 -A.sub.N, each representing one of Q quantization points of an input signal, where Q is an integer equal to or less than 2.sup.x and X is a positive number, synthesizes the code information A.sub.1 -A.sub.N into a code H through an operation:H=A.sub.1 Q.sup.N-1 +A.sub.2 Q.sup.N-2 + . . . +A.sub.N-1 Q+A.sub.N,and outputs the code H. The decoder inputs the code H, separates the code H into code information A.sub.1 -A.sub.N through operations with decimal fractions of quotients truncated:A.sub.1 =H/Q.sup.N-1A.sub.2 =(H-A.sub.1 Q.sup.N-1)/Q.sup.N-2A.sub.N-1 =(H-A.sub.1 Q.sup.N-1 -A.sub.2 Q.sup.N-2 - . . . -A.sub.N-2 Q.sup.2)/QA.sub.N =H-A.sub.1 Q.sup.N-1 -A.sub.2 Q.sup.N-2 - . . . -A.sub.N-2 Q.sup.2 -A.sub.N-1 Q,and reproduces an output signal based upon the thus-separated code information A.sub.1 -A.sub.N.

摘要翻译： 编码器生成代码信息A1-AN，每个代码信息A1-AN表示输入信号的Q个量化点之一，其中Q是等于或小于2×的整数，X是正数，将代码信息A1-AN合成为代码H 通过操作：H = A1QN-1 + A2QN-2 +。 。 。 + AN-1Q + AN，并输出代码H.解码器输入代码H，通过截断的商的小数部分的操作将代码H分成代码信息A1-AN：A1 = H / QN-1 A2 =（H -A 1 QN-1）/ QN-2 AN-1 =（H-AlQN-1-A2QN-2- ... -AN-2Q2）/ Q AN = H-AlQN-1-A2QN-2-。 。 。 -AN-2Q2-AN-1Q，并且基于这样分离的代码信息A1-AN再现输出信号。

公开(公告)号：US5765128A

公开(公告)日：1998-06-09

申请号：US537454

申请日：1995-10-02

申请人： Mitsuru Tsuboi ,  Naoji Fujino ,  Noboru Kobayashi ,  Toshiaki Nobumoto ,  Toshiyuki Ohta ,  Yutaka Moriyama ,  Nobuhide Eguchi ,  Miki Murakawa

发明人： Mitsuru Tsuboi ,  Naoji Fujino ,  Noboru Kobayashi ,  Toshiaki Nobumoto ,  Toshiyuki Ohta ,  Yutaka Moriyama ,  Nobuhide Eguchi ,  Miki Murakawa

IPC分类号： G11B20/10 ,  G10L19/14 ,  H04B14/04 ,  H04L7/00 ,  H04L7/04 ,  H04L7/08 ,  G10L3/00

CPC分类号： G10L19/16 ,  H04L7/0083 ,  H04L7/041

摘要： An apparatus synchronizes a voice coder and a voice decoder which are of the vector-coding type in order to prevent a false synchronization even when a signal having the same period as a string of synchronizing bits is inputted. A noise component adding unit adds a noise component to an input voice signal. Therefore, even if the input voice signal has the same period as that of a string of synchronizing bits and is completely periodic, the periodicity of the input voice signal is lost by the added noise component. Based on the input voice signal which is no longer periodic, a vector-coding unit, a quantizing signal vector generating unit, and a code book index transmitting unit generate code book indexes and transmit the generated code book indexes to a voice decoder. Therefore, the voice decoder is prevented from developing a false synchronization.

摘要翻译： 即使当输入了与一串同步位相同的周期的信号时，装置同步具有向量编码类型的语音编码器和语音解码器，以便防止错误同步。 噪声分量添加单元将噪声分量添加到输入语音信号。 因此，即使输入语音信号与同步比特串的周期相同，并且是完全周期性的，所以输入语音信号的周期性被附加的噪声分量丢失。 基于不再周期性的输入语音信号，矢量编码单元，量化信号矢量生成单元和码本索引发送单元生成码本索引，并将生成的码本索引发送到语音解码器。 因此，防止语音解码器发生伪同步。

公开(公告)号：US20050157884A1

公开(公告)日：2005-07-21

申请号：US10858996

申请日：2004-06-02

申请人： Nobuhide Eguchi

发明人： Nobuhide Eguchi

IPC分类号： G10L19/00 ,  H03M7/30 ,  H04S1/00 ,  H04R5/00

CPC分类号： G10L19/008

摘要： An audio encoding apparatus for stereo audio encoding an L-channel PCM signal and an R-channel PCM signal efficiently allocates encoded data of the L-channel and the R-channel without varying an existing format and performs MS stereo on/off control and controls of a bit allocation amount or a frame region for the inputted PCM signals while miniaturization of the apparatus can be anticipated. A correlation degree calculation section calculates, based on the PCM signals of the L-channel and the R-channel, a correlation degree between the PCM signals, and decision section decides whether or not a stereo encoding process should be performed based on the calculated correlation degree. An allocation section allocates regions for individually storing a difference signal and a sum signal between the PCM signals based on a result of the decision, and an audio encoding section encodes the difference signal and the sum signal based on the allocated regions.

摘要翻译： 用于L信道PCM信号和R信道PCM信号的立体声音频编码的音频编码装置有效地分配L信道和R信道的编码数据，而不改变现有格式并执行MS立体声开/关控制和控制 对于输入的PCM信号的位分配量或帧区域，同时可以预期该设备的小型化。 相关度计算部分基于L信道和R信道的PCM信号计算PCM信号之间的相关度，并且判决部分基于所计算的相关性来确定是否应该执行立体声编码处理 度。 分配部分基于决定的结果分配用于单独存储差分信号和PCM信号之间的和信号的区域，并且音频编码部分基于分配的区域对差分信号和和信号进行编码。

公开(公告)号：US20080077413A1

公开(公告)日：2008-03-27

申请号：US11902770

申请日：2007-09-25

申请人： Nobuhide Eguchi

发明人： Nobuhide Eguchi

IPC分类号： G10L19/00

CPC分类号： G10L19/035

摘要： An audio coding device that optimizes quantization parameters for fast convergence of iterations. A quantized bit counter calculates a codeword length representing the number of bits of a Huffman codeword corresponding to quantized values. The quantized bit counter also calculates a codebook number bit count representing how many bits are consumed for optimal Huffman codebook numbers, and a scale factor bit count representing how many bits are consumed for scale factors of each subband. In a first stage of quantization, the quantized bit counter accumulates lengths of Huffman codewords corresponding to quantized values of every nth subband. A bit count estimator calculates a total bit count estimate by adding up n times the accumulated codeword length, the codebook number bit count, and the scale factor bit count. A parameter updater updates quantization parameters if the total bit count estimate exceeds a bit count limit.

摘要翻译： 一种优化量化参数以便迭代快速收敛的音频编码装置。 量化比特计数器计算表示对应于量化值的霍夫曼码字的比特数的码字长度。 量化比特计数器还计算表示针对最佳霍夫曼码本号码消耗多少比特的码本号比特数，以及表示每个子带的比例因子消耗多少比特的比例因子比特计数。 在量化的第一阶段中，量化比特计数器累加对应于第n个子带的量化值的霍夫曼码字长度。 比特计数估计器通过将累积码字长度，码本号码计数和比例因子比特计数相加n倍来计算总比特计数估计。 如果总比特数估计超过比特计数限制，则参数更新器更新量化参数。

公开(公告)号：US20060004565A1

公开(公告)日：2006-01-05

申请号：US11019610

申请日：2004-12-23

申请人： Nobuhide Eguchi

发明人： Nobuhide Eguchi

IPC分类号： G10L19/00

CPC分类号： G10L19/0208

摘要： An encoding device which encodes audio signals comprises a spectrum power calculation unit for calculating the power of each spectrum obtained by analyzing the frequency of an input audio signal, a tonality parameter calculation unit for calculating a tonality parameter indicating the pure tone level of the input audio signal in each sub-band, using the result of the calculation when dividing the frequency range of the spectrum of the input audio signal into a plurality of sub-bands, and a dynamic masking threshold calculation unit for calculating a dynamic masking threshold value of the masking energy of the input audio signal, using the calculated tonality parameter.

摘要翻译： 编码音频信号的编码装置包括频谱功率计算单元，用于计算通过分析输入音频信号的频率而获得的每个频谱的功率;音调参数计算单元，用于计算表示输入音频的纯音电平的音调参数 在将输入音频信号的频谱的频率范围分割为多个子频带的情况下，使用计算结果，在动态屏蔽阈值计算单元中，计算动态屏蔽阈值 使用计算出的音调参数掩蔽输入音频信号的能量。

公开(公告)号：US08019601B2

公开(公告)日：2011-09-13

申请号：US11902770

申请日：2007-09-25

申请人： Nobuhide Eguchi

发明人： Nobuhide Eguchi

IPC分类号： G10L21/00 ,  G10L19/00 ,  G10L21/04

CPC分类号： G10L19/035

摘要： An audio coding device that optimizes quantization parameters for fast convergence of iterations. A quantized bit counter calculates a codeword length representing the number of bits of a Huffman codeword corresponding to quantized values. The quantized bit counter also calculates a codebook number bit count representing how many bits are consumed for optimal Huffman codebook numbers, and a scale factor bit count representing how many bits are consumed for scale factors of each subband. In a first stage of quantization, the quantized bit counter accumulates lengths of Huffman codewords corresponding to quantized values of every nth subband. A bit count estimator calculates a total bit count estimate by adding up n times the accumulated codeword length, the codebook number bit count, and the scale factor bit count. A parameter updater updates quantization parameters if the total bit count estimate exceeds a bit count limit.

摘要翻译： 一种优化量化参数以便迭代快速收敛的音频编码装置。 量化比特计数器计算表示对应于量化值的霍夫曼码字的比特数的码字长度。 量化比特计数器还计算表示针对最佳霍夫曼码本号码消耗多少比特的码本号比特数，以及表示每个子带的比例因子消耗多少比特的比例因子比特计数。 在量化的第一阶段中，量化比特计数器累加对应于每第n个子带的量化值的霍夫曼码字长度。 比特计数估计器通过将累积码字长度，码本号码比特数和比例因子比特计数相加n倍来计算总比特计数估计。 如果总比特数估计超过比特计数限制，则参数更新器更新量化参数。