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78 条记录 (耗时 0.037 秒)

    Transcoding system using encoding history information
    15.
    发明申请
    Transcoding system using encoding history information 审中-公开
    转码系统使用编码历史信息

    公开(公告)号：US20070263719A1

    公开(公告)日：2007-11-15

    申请号：US11879401

    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。

    Apparatus and method for performing an editing operation on data read-out from a storage medium which allows random access
    17.
    发明授权
    Apparatus and method for performing an editing operation on data read-out from a storage medium which allows random access 失效
    对从允许随机访问的存储介质读出的数据执行编辑操作的装置和方法

    公开(公告)号：US06501901B2

    公开(公告)日：2002-12-31

    申请号：US09009049

    申请日：1998-01-20

    申请人： Mikita Yasuda ,  Katsumi Tahara ,  Motoki Kato

    发明人： Mikita Yasuda ,  Katsumi Tahara ,  Motoki Kato

    IPC分类号： H04N593

    CPC分类号： G11B27/105 ,  G11B27/034 ,  G11B27/036 ,  G11B27/11 ,  G11B27/329 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B2220/2562 ,  G11B2220/65

    摘要： When editing an image signal and a sound signal or these signals multiplexed using a conventional digital signal editing apparatus, it is necessary to provide a reproduction apparatus for reproducing an original signal and a recording apparatus for recording the signal edited. This significantly increases the size of the editing system. According to the present invention, a read-out unit 2 reads out I pictures, B pictures, P pictures, and a reproduction information on a reproduction interval of this coded data from a storage medium 1 allowing random access. A storage unit 3 stores the reproduction information read out from the storage medium 1 by the read-out unit 2. A control unit 3 controls read-out of the read-out unit 2 according to the aforementioned reproduction information from the storage unit 3. A decoding unit 5 decodes the coded data which have been read out by the read-out unit 2 controlled by the control unit 4, in such a manner that the data are temporally continuous and outputs an edited decoded data string.

    摘要翻译： 当使用传统的数字信号编辑装置编辑图像信号和声音信号或这些信号进行多路复用时，需要提供用于再现原始信号的再现装置和用于记录所编辑的信号的记录装置。 这显着增加了编辑系统的尺寸。根据本发明，读出单元2从存储介质1中读出I图像，B图像，P图像和关于该编码数据的再现间隔的再现信息 允许随机访问。 存储单元3存储由读出单元2从存储介质1读出的再现信息。控制单元3根据来自存储单元3的上述再现信息控制读出单元2的读出。 解码单元5以由数据在时间上连续的方式解码由控制单元4控制的读出单元2读出的编码数据，并输出编辑的解码数据串。

    Communication apparatus which handles a time stamp
    18.
    发明授权
    Communication apparatus which handles a time stamp 失效
    处理时间戳的通讯设备

    公开(公告)号：US06493832B1

    公开(公告)日：2002-12-10

    申请号：US09280430

    申请日：1999-03-29

    申请人： Eisaburo Itakura ,  Yoichi Matsumura ,  Katsumi Tahara ,  Hiroaki Seto

    发明人： Eisaburo Itakura ,  Yoichi Matsumura ,  Katsumi Tahara ,  Hiroaki Seto

    IPC分类号： G06F104

    CPC分类号： H04N21/8547 ,  H04N21/2368 ,  H04N21/2381 ,  H04N21/242 ,  H04N21/64307

    摘要： A transmission side of a communication apparatus of the present invention makes use of a clock signal synchronized with a network to transmit an arrival interval of a PCR packet in which a PCR value is included and a synchronization residual. A reception side of the communication apparatus of the present invention calculates delay fluctuations caused by the network from the arrival interval and the synchronization residual included in the received PCR packet and modifies the PCR value based on the delay fluctuations.

    摘要翻译： 本发明的通信装置的发送侧利用与网络同步的时钟信号来发送包含PCR值的PCR分组的到达间隔和同步残差。 本发明的通信装置的接收侧根据包括在接收到的PCR分组中的到达间隔和同步残差来计算由网络引起的延迟波动，并且基于延迟波动来修改PCR值。

    Compressed picture data editing apparatus and method
    19.
    发明授权
    Compressed picture data editing apparatus and method 有权
    压缩图像数据编辑装置及方法

    公开(公告)号：US06345122B1

    公开(公告)日：2002-02-05

    申请号：US09231055

    申请日：1999-01-14

    申请人： Atsushi Yamato ,  Katsumi Tahara ,  Mikita Yasuda ,  Shinji Negishi

    发明人： Atsushi Yamato ,  Katsumi Tahara ,  Mikita Yasuda ,  Shinji Negishi

    IPC分类号： G06K946

    CPC分类号： H04N21/23406 ,  G11B27/032 ,  G11B27/034 ,  G11B27/036 ,  G11B2220/20 ,  G11B2220/90 ,  H04N21/23424 ,  H04N21/23611 ,  H04N21/44004 ,  H04N21/44016 ,  H04N21/812

    摘要： An editing apparatus and the like are provided for splicing two data streams of compressed picture data at an arbitrary splice point without breaking down the VBV buffer. The editing apparatus inserts between a main stream and a sub-stream compressed by the MPEG-2/Video Method an inserted stream of which a first picture is a black I picture and succeeding pictures are repeat P pictures of which all macro blocks are skipped macro blocks. In this inserted stream, a VBV delay of a picture to be transmitted next, after a last picture in the main stream, is written as a VBV delay of a first picture in the main stream into the picture header. Further, a stuffing byte of which the data amount is calculated based on the bit occupancy in the VBV buffer by the sub-stream at an arbitrary splice point is transmitted along with the last picture in the inserted stream.

    摘要翻译： 提供编辑装置等用于在任意的拼接点拼接两个压缩图象数据的数据流而不分解VBV缓冲器。 编辑装置插入主流和通过MPEG-2 /视频方法压缩的子流之间，其中第一图像是黑色I图像的插入流和后续图像是重复所有宏块被跳过宏的P图像 块。 在该插入流中，在主流中的最后一个图像之后的下一个要发送的图像的VBV延迟被写入主流中的第一图像的VBV延迟到图像头。 此外，通过任意拼接点处的子流，基于VBV缓冲器中的比特占有率计算数据量的填充字节与插入流中的最后一个图像一起被发送。

    Signal encoding method and apparatus and signal transmission method and apparatus involving the use of a number of pseudo access units
    20.
    发明授权
    Signal encoding method and apparatus and signal transmission method and apparatus involving the use of a number of pseudo access units 失效
    信号编码方法以及涉及使用多个伪访问单元的装置和信号传输方法及装置

    公开(公告)号：US6055271A

    公开(公告)日：2000-04-25

    申请号：US786086

    申请日：1997-01-17

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

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

    IPC分类号： H04N21/234 ,  H04N21/2368 ,  H04N21/434 ,  H04N21/44 ,  H04N7/16

    CPC分类号： H04N21/23406 ,  H04N21/2368 ,  H04N21/42646 ,  H04N21/4334 ,  H04N21/4341 ,  H04N21/44004

    摘要： A method and apparatus for encoding a digital signal in the form of a stream, which will be decoded later via a predetermined number of buffers, in which the digital signal is encoded by dividing each access unit defined for each bit stream into pseudo access units each having a predetermined size, calculating the time when the inputting of each pseudo access unit to the buffer is completed on the basis of the decoding time of the access unit and the data transfer rate of the buffer, and converting the pseudo access units into a packet so that the pseudo access units will be input to the buffer by the time determined by the calculation. If each access unit for each bit stream has a small size and if the decoding interval between adjacent access units is short, a plurality of the access units are combined into a single pseudo access unit depending on the size of the buffer and the data transfer rate of the buffer. The invention also provides a method and apparatus for transmitting similarly obtained data. Furthermore, the invention provides a recording medium for recording similarly obtained data.

    摘要翻译： 用于以流形式对数字信号进行编码的方法和装置，其将通过预定数量的缓冲器稍后解码，其中数字信号通过将为每个比特流定义的每个访问单元划分为伪访问单元来编码数字信号 根据存取单元的解码时间和缓冲器的数据传送速率，计算出每个伪访问单元输入到缓冲区的时间，并将该伪访问单元转换成一个分组 使得伪访问单元将由计算确定的时间输入到缓冲器。 如果每个比特流的每个访问单元具有小的大小，并且如果相邻访问单元之间的解码间隔较短，则根据缓冲区的大小和数据传输速率将多个访问单元组合成单个伪访问单元 的缓冲区。 本发明还提供了用于传送类似地获得的数据的方法和装置。 此外，本发明提供了用于记录类似地获得的数据的记录介质。