公开(公告)号：US07145484B2

公开(公告)日：2006-12-05

申请号：US10535708

申请日：2003-11-20

申请人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

IPC分类号： H03M7/30

CPC分类号： G10L19/04 ,  G10L19/097

摘要： A sample sequence ΔS similar to a first or last sample sequence of the current frame is extracted from its samples SFC and concatenated, as an alternative sample sequence AS, to each of the front and back of the current frame, and the current frame with the alternative sample sequence concatenated thereto is subjected to filtering or prediction coding to obtain processing result SOU of the current frame. In the case of prediction coding, auxiliary information, which indicates which part of the current frame was used as the alternative sample sequence, is also output. By this, filtering, autoregressive prediction coding and decoding, which require processing extending over preceding and succeeding frames as in an interpolation filter, can be concluded in the current frame with substantially no degradation of the continuity and coding efficient of the reconstructed signal.

摘要翻译： 从其样本S FC提取类似于当前帧的第一或最后一个样本序列的样本序列DeltaS作为替代样本序列AS，并入到当前帧的前后的每一个 帧，并且将其中连接有替代采样序列的当前帧进行滤波或预测编码，以获得当前帧的处理结果S OU。 在预测编码的情况下，也输出指示当前帧的哪一部分被用作替代样本序列的辅助信息。 由此，可以在当前帧中得出如在内插滤波器中要求在前一帧和后一帧之上扩展的处理的滤波，自回归预测编码和解码，其中重建信号的连续性和编码效率基本上不降低。

公开(公告)号：US06549147B1

公开(公告)日：2003-04-15

申请号：US09572789

申请日：2000-05-17

申请人： Takehiro Moriya ,  Naoki Iwakami ,  Akio Jin ,  Takeshi Mori ,  Kazuaki Chikira

发明人： Takehiro Moriya ,  Naoki Iwakami ,  Akio Jin ,  Takeshi Mori ,  Kazuaki Chikira

IPC分类号： H03M700

CPC分类号： H04N19/00 ,  H03M7/30 ,  H04N19/90

摘要： An object of the invention is to provide a method for compressing digital input signals at high compression efficiency and reproducing the input data perfectly. The method includes the steps of: converting a digital input signal in each frame to bitstreams according to a sign-magnitude format; deblocking the bitstreams into individual bits; joining each bit in a time sequence while retaining an identical chronological order of bits in all the frames; and reversibly encoding each bitstream obtained by joining the bits. And, the reversible decoding method includes the steps of: reversibly decoding a reversible code sequence in each frame; deblocking the bitstreams obtained by reversible decoding into individual bits; joining each bit in a time sequence while retaining an identical chronological order of bits in all the frames; and joining successive frames obtained by joining the bits.

摘要翻译： 本发明的目的是提供一种以高压缩效率压缩数字输入信号并且完美地再现输入数据的方法。 该方法包括以下步骤：根据符号幅度格式将每帧中的数字输入信号转换为比特流; 将比特流解块为单独的比特; 以时间顺序连接每个比特，同时保留所有帧中相同的时间顺序的比特; 并且可逆地编码通过连接比特获得的每个比特流。 并且，可逆解码方法包括以下步骤：对每帧中的可逆码序列进行可逆解码; 将通过可逆解码获得的比特流解块为单独的比特; 以时间顺序连接每个比特，同时保留所有帧中相同的时间顺序的比特; 并连接通过连接比特获得的连续帧。

公开(公告)号：US06658382B1

公开(公告)日：2003-12-02

申请号：US09534297

申请日：2000-03-23

申请人： Naoki Iwakami ,  Takehiro Moriya ,  Akio Jin ,  Kazuaki Chikira ,  Takeshi Mori

发明人： Naoki Iwakami ,  Takehiro Moriya ,  Akio Jin ,  Kazuaki Chikira ,  Takeshi Mori

IPC分类号： G10L1902

CPC分类号： G10L19/0212

摘要： An input signal is time-frequency transformed, then the frequency-domain coefficients are divided into coefficient segments of about 100 Hz width to generate a sequence of coefficient segments, and the sequence of coefficient segments is split into subbands each consisting of plural coefficient segments. A threshold value is determined based on the intensity of each coefficient segment in each subband. The intensity of each coefficient segment is compared with the threshold value, and the coefficient segments are classified into low- and high-intensity groups. The coefficient segments are quantized for each group, or they are flattened respectively and then quantized through recombination.

摘要翻译： 输入信号被时间频率变换，频域系数被划分为大约100Hz宽度的系数段，以产生一系列系数段，并将系数段序列分成各个由多个系数段组成的子带。 基于每个子带中的每个系数段的强度来确定阈值。 将每个系数段的强度与阈值进行比较，将系数段分为低强度组和高强度组。 每个组对系数段进行量化，或者分别对其进行平坦化，然后通过重组进行量化。