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    Method and apparatus for verifying multiplexing schedule of digital signals and apparatus for multiplexing digital signals
    51.
    发明授权
    Method and apparatus for verifying multiplexing schedule of digital signals and apparatus for multiplexing digital signals 失效
    用于验证数字信号的复用调度的方法和装置以及用于复用数字信号的装置

    公开(公告)号：US06285689B1

    公开(公告)日：2001-09-04

    申请号：US08859402

    申请日：1997-05-20

    申请人： Shinji Negishi ,  Katsumi Tahara ,  Mikita Yasuda ,  Noriaki Oishi

    发明人： Shinji Negishi ,  Katsumi Tahara ,  Mikita Yasuda ,  Noriaki Oishi

    IPC分类号： H04J316

    CPC分类号： H04N21/4344 ,  H04N7/52 ,  H04N21/2368 ,  H04N21/2389 ,  H04N21/4305 ,  H04N21/4341 ,  H04N21/4385 ,  H04N21/44004

    摘要： A method and an apparatus for verifying a multiplexing schedule of digital signals and an apparatus for multiplexing the digital signals are provided. The verifying method includes the processes of extracting access unit information about each decoding unit from each elementary stream of the digital signal, determining schedule information about time division of each elementary stream, based on the access unit information, and verifying whether or not the multiplexing schedule for generating the multiplexed stream is valid, based on the access unit information and the schedule information. The verifying apparatus includes an extracting section for extracting access unit information about a decoding unit from each elementary stream of the digital signal, a determining section for determining schedule information about time division of the elementary stream, based on the access unit information, and a verifying section for verifying whether or not the multiplexing schedule for generating the multiplexed stream is valid, based on the access unit information and the schedule information.

    摘要翻译： 提供一种用于验证数字信号的复用调度的方法和装置以及用于复用数字信号的装置。 验证方法包括从数字信号的每个基本流提取关于每个解码单元的接入单元信息的过程，基于接入单元信息确定关于每个基本流的时分的调度信息，以及验证复用调度 基于访问单元信息和日程信息来生成复用流是有效的。 验证装置包括：提取部，用于从数字信号的每个基本流提取关于解码单元的存取单元信息;确定部，用于基于访问单元信息确定关于基本流的时分的调度信息，以及验证 用于基于所述访问单元信息和所述调度信息来验证用于生成所述多路复用流的复用调度是否有效。

    Coding according to degree of coding difficulty in conformity with a target bit rate
    53.
    发明授权
    Coding according to degree of coding difficulty in conformity with a target bit rate 失效
    根据目标比特率根据编码难度编码

    公开(公告)号：US5963256A

    公开(公告)日：1999-10-05

    申请号：US775515

    申请日：1997-01-02

    申请人： Katsumi Tahara

    发明人： Katsumi Tahara

    IPC分类号： H04N7/50 ,  H04N7/52 ,  H04N7/24

    CPC分类号： H04N19/184 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/179 ,  H04N19/61 ,  H04N21/2365 ,  H04N21/2662 ,  H04N19/146

    摘要： In multiplexing a plurality of coded data, degrees of difficulty of coding of the data are measured, coding rate for each of the data is decided by allotting a certain target bit rate with a ratio of the each of the measured degrees of difficulty of coding so that the bit rate of the multiplexed data becomes equal to the target bit rate, the data is then coded in response to the decided coding rates, and the coded data is multiplexed before being outputted to a transmission line or recording medium. Thus, the bit rate of the outputted data is always kept at the target value to improve the usage rate of a transmission line.

    摘要翻译： 在多路复用多个编码数据时，测量数据的编码难度，通过以测量的每个难度编码的比率分配某个目标比特率来确定每个数据的编码率 多路复用数据的比特率变得等于目标比特率，然后响应于所确定的编码率对数据进行编码，并且编码数据在被输出到传输线或记录介质之前被多路复用。 因此，输出数据的比特率总是保持在目标值以提高传输线的使用率。

    Picture signal reproducing method and picture signal reproducing apparatus
    56.
    发明授权
    Picture signal reproducing method and picture signal reproducing apparatus 失效
    图像信号再现方法和图像信号再现装置

    公开(公告)号：US5644506A

    公开(公告)日：1997-07-01

    申请号：US397210

    申请日：1995-04-17

    申请人： Toru Okazaki ,  Jun Yonemitsu ,  Katsumi Tahara ,  Yasushi Fujinami

    发明人： Toru Okazaki ,  Jun Yonemitsu ,  Katsumi Tahara ,  Yasushi Fujinami

    IPC分类号： H04N5/765 ,  H04N5/775 ,  H04N5/781 ,  H04N5/85 ,  H04N5/92 ,  H04N5/922 ,  H04N5/937 ,  H04N7/50 ,  H04N9/804 ,  H04J3/00

    CPC分类号： H04N19/00 ,  H04N19/61 ,  H04N21/23406 ,  H04N21/43622 ,  H04N21/4363 ,  H04N21/44004 ,  H04N21/6377 ,  H04N21/658 ,  H04N5/765 ,  H04N19/146 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042

    摘要： Only monitor side is caused to have decoding unit portion for bit stream, and reading unit portion for bit stream, decoding unit portion for bit stream and recording unit portion for bit stream are linked by digital network. Reproducing unit is caused to have a function to reproduce bit stream as it is, and recording unit is caused to have a function to record bit stream as it is. Bit stream reproducing unit and bit stream decoding unit of the monitor side, and such reproducing unit and bit stream recording unit are linked by high speed digital network. Thus, in the case where there is constructed a moving picture reproducing system such that a plurality of moving picture reproducing units are connected to one moving picture display unit to utilize source desired to see by selection of switch, cost can be reduced and degradation of the picture quality can be prevented.

    摘要翻译： PCT No.PCT / JP94 / 01140 Sec。 371日期1995年04月17日 102（e）日期1995年4月17日PCT 1994年7月12日PCT公布。 公开号WO95 / 02947 日期1995年1月26日只有监视器侧具有用于比特流的解码单元部分，并且用于比特流的读取单元部分，用于比特流的解码单元部分和用于比特流的记录单元部分由数字网络链接。 使再现单元具有再现位流的功能，并且使得记录单元具有直接记录比特流的功能。 监视器侧的比特流再现单元和比特流解码单元，并且这种再现单元和比特流记录单元通过高速数字网络链接。 因此，在构成运动图像再现系统的情况下，使得多个运动图像再现单元连接到一个运动图像显示单元以利用通过选择开关而需要看到的源，可以降低成本并降低 可以防止图像质量。

    Transcoding system using encoding history information
    60.
    发明授权
    Transcoding system using encoding history information 失效
    转码系统使用编码历史信息

    公开(公告)号：US08687690B2

    公开(公告)日：2014-04-01

    申请号：US11879407

    申请日：2007-07-17

    申请人： Katsumi Tahara ,  Yoshihiro Murakami ,  Takuya Kitamura ,  Kanji Mihara

    发明人： Katsumi Tahara ,  Yoshihiro Murakami ,  Takuya Kitamura ,  Kanji Mihara

    IPC分类号： H04B1/66

    CPC分类号： H04N19/0006 ,  H04N19/10 ,  H04N19/107 ,  H04N19/115 ,  H04N19/152 ,  H04N19/40 ,  H04N19/428 ,  H04N19/61

    摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

    摘要翻译： 本发明提供一种具有MPEG解码器和MPEG编码器的代码转换器，用于改变作为编码处理的结果获得的GOP结构和编码比特流的比特率。 MPEG编码器接收在过去的编码处理中生成的过去的编码参数作为历史信息，并且通过选择性地使用过去的编码参数来执行当前编码处理，使得当前编码处理被优化。 此外，编码器将过去的编码参数描述为编码比特流中的历史信息，以便在预编码处理中重用历史信息。 即使通过代码转换器重复执行解码和编码处理，视频数据的图像质量也不会劣化。