公开(公告)号：US20080013626A1

公开(公告)日：2008-01-17

申请号：US11879406

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.

公开(公告)号：US20080013625A1

公开(公告)日：2008-01-17

申请号：US11879400

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.

公开(公告)号：US06834083B1

公开(公告)日：2004-12-21

申请号：US09719792

申请日：2001-03-26

申请人： Katsumi Tahara ,  Yasuo Iwasaki ,  Tetsuya Iwamoto ,  James Hedley Wilkinson

发明人： Katsumi Tahara ,  Yasuo Iwasaki ,  Tetsuya Iwamoto ,  James Hedley Wilkinson

IPC分类号： H04N712

CPC分类号： H04N21/4342 ,  G11B27/032 ,  G11B27/3027 ,  G11B2220/90 ,  H04N5/765 ,  H04N9/8042 ,  H04N9/8063 ,  H04N9/8205 ,  H04N21/23602

摘要： This invention relates to a data transmission method or the like for use in transmitting video data, audio data or the like. There is transmitted a serial digital transfer interface transmission packet in which an interval of each line of a video frame comprises an end synchronizing code area into which an end synchronizing code is inserted, an ancillary data area into which ancillary data is inserted, a start synchronizing code area into which a start synchronizing code is inserted and a payload area. Into the payload area, there are inserted first data containing extension data having stream information and second data containing main data comprising video data and/or audio data at the picture unit of video data. The stream information is information which indicates whether or not the picture unit belongs to a pre-roll interval located ahead of an editing interval, whether or not the picture unit belongs to an editing interval and whether or not the picture unit belongs to a post-roll interval located behind an editing interval. A reception side becomes able to positively edit data on a VTR, for example, by effectively utilizing the stream information.

摘要翻译： 本发明涉及用于传输视频数据，音频数据等的数据传输方法等。 发送串行数字传输接口传输分组，其中视频帧的每行的间隔包括其中插入结束同步代码的结束同步码区域，辅助数据插入到其中的辅助数据区域，开始同步 代码区域，其中插入开始同步代码和有效负载区域。 在有效载荷区域中，插入包含具有流信息的扩展数据的第一数据和包含视频数据和/或音频数据的主数据的第二数据在视频数据的图像单元。 流信息是指示图像单元是否属于编辑间隔之前的前贴片间隔的信息，图像单元是否属于编辑间隔，以及图像单元是否属于后期编辑间隔， 滚动间隔位于编辑间隔之后。 接收侧能够通过例如有效利用流信息来正确编辑VTR上的数据。

公开(公告)号：US06349115B1

公开(公告)日：2002-02-19

申请号：US09258428

申请日：1999-02-26

申请人： Katsumi Tahara ,  Hideki Koyanagi

发明人： Katsumi Tahara ,  Hideki Koyanagi

IPC分类号： H04B166

CPC分类号： H04N19/436 ,  H04N5/4401 ,  H04N11/002 ,  H04N21/23406 ,  H04N21/2365 ,  H04N21/4347 ,  H04N21/44004

摘要： In the speckled broadcasting of HDTV and SDTV, an encoding transmitting apparatus and a decoding receiving apparatus can perform a parallel multichannel transmission and reception of SDTV with a simple construction. When an HDTV video signal is encoded and decoded, each of the transmission buffer 30 and the reception buffer 80 is used as a single buffer. On the other hand, when a plurality of SDTV video signals are encoded and decoded, the transmission buffer 30 and the reception buffer 80 are divided into the number of SDTV video signals to use them as a plurality of divided transmission buffers and a plurality of divided reception buffers, so as to perform a encoding and decoding processing.

摘要翻译： 在HDTV和SDTV的有斑点的广播中，编码发送装置和解码接收装置可以以简单的结构执行SDTV的并行多路传输和接收。 当HDTV视频信号被编码和解码时，发送缓冲器30和接收缓冲器80都被用作单个缓冲器。 另一方面，当对多个SDTV视频信号进行编码和解码时，发送缓冲器30和接收缓冲器80被划分成多个SDTV视频信号，以将它们用作多个划分的发送缓冲器和多个分割的 接收缓冲器，以便执行编码和解码处理。

公开(公告)号：US06295407B1

公开(公告)日：2001-09-25

申请号：US09630265

申请日：2000-08-01

申请人： Katsumi Tahara ,  Hideki Koyanagi ,  Yoichi Yagasaki ,  Yasushi Fujinami

发明人： Katsumi Tahara ,  Hideki Koyanagi ,  Yoichi Yagasaki ,  Yasushi Fujinami

IPC分类号： H04N5913

CPC分类号： H04N1/32149 ,  H04N5/913 ,  H04N5/9264 ,  H04N21/2541 ,  H04N21/4334 ,  H04N21/4627 ,  H04N21/835 ,  H04N21/8355 ,  H04N21/8358 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/91335

摘要： A formatting apparatus authenticates an information signal prior to mass duplication of the signal by analyzing the signal to detect the presence or absence of a security signal therein, inserting a security signal into the information signal, and recording the modified signal only if no security signal was detected.

摘要翻译： 格式化装置通过分析信号来检测信号的大量复制之前对信息信号进行认证，以检测其中是否存在安全信号，将安全信号插入到信息信号中，并且仅在没有安全信号为 检测到。

公开(公告)号：US5991499A

公开(公告)日：1999-11-23

申请号：US697794

申请日：1996-08-30

申请人： Yoichi Yagasaki ,  Hideki Koyanagi ,  Katsumi Tahara ,  Yasushi Fujinami

发明人： Yoichi Yagasaki ,  Hideki Koyanagi ,  Katsumi Tahara ,  Yasushi Fujinami

IPC分类号： H04N5/913 ,  H04N7/50 ,  H04N5/91

CPC分类号： H04N19/61 ,  H04N5/913 ,  H04N2005/91328

摘要： Unauthorized copying of a digital video program is prevented by designating a first block and a second block of data in a bit stream encoded by a fixed length code. A portion of the first block is selected as key data and inserted into the second block to indicate that the digital video program is a copy and to prevent illegal copying.

摘要翻译： 通过指定由固定长度码编码的比特流中的第一块和第二数据块来防止数字视频节目的非授权复制。 选择第一块的一部分作为关键数据并插入到第二块中以指示数字视频节目是副本并防止非法复制。

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。

公开(公告)号：US5832124A

公开(公告)日：1998-11-03

申请号：US341546

申请日：1995-02-08

申请人： Tomoyuki Sato ,  Katsumi Tahara

发明人： Tomoyuki Sato ,  Katsumi Tahara

IPC分类号： H04N5/92 ,  G06T9/00 ,  H04N7/01 ,  H04N7/015 ,  H04N19/107 ,  H04N19/114 ,  H04N19/12 ,  H04N19/126 ,  H04N19/152 ,  H04N19/176 ,  H04N19/186 ,  H04N19/196 ,  H04N19/33 ,  H04N19/423 ,  H04N19/46 ,  H04N19/463 ,  H04N19/50 ,  H04N19/503 ,  H04N19/51 ,  H04N19/517 ,  H04N19/577 ,  H04N19/59 ,  H04N19/61 ,  H04N19/625 ,  H04N19/70 ,  H04N19/80 ,  H04N19/91

CPC分类号： H04N19/577 ,  H04N19/30 ,  H04N19/59 ,  H04N19/61 ,  H04N19/80

摘要： Apparatus and method for coding a moving picture signal and decoding a coded moving picture signal. The input picture signal of higher resolution is down-sampled at respective ratios in the longitudinal and lateral directions to generate a picture signal of lower resolution having a different aspect ratio. The coded picture signal of lower resolution is up-sampled at respective ratios in the longitudinal and lateral directions to generate a picture signal of higher resolution having a different aspect ratio.

摘要翻译： PCT No.PCT / JP94 / 00499 Sec。 371日期1995年2月8日 102（e）日期1995年2月8日PCT 1994年3月28日PCT公布。 第WO94 / 23535号公报 日期1994年10月13日用于编码运动图像信号并解码编码运动图像信号的装置和方法。 较高分辨率的输入图像信号在纵向和横向各自的比例下进行下采样，以产生具有不同纵横比的较低分辨率的图像信号。 较低分辨率的编码图像信号在纵向和横向各自的比例下进行上采样，以产生具有不同纵横比的较高分辨率的图像信号。

公开(公告)号：US5663763A

公开(公告)日：1997-09-02

申请号：US137257

申请日：1993-10-18

申请人： Yoichi Yagasaki ,  Tohru Wada ,  Katsumi Tahara

发明人： Yoichi Yagasaki ,  Tohru Wada ,  Katsumi Tahara

IPC分类号： H04N7/26 ,  H04N7/30 ,  H04N7/46 ,  H04N7/50 ,  H04N7/24

CPC分类号： H04N19/577 ,  H04N19/112 ,  H04N19/126 ,  H04N19/61 ,  H04N19/85 ,  H04N19/124 ,  H04N19/13 ,  H04N19/60 ,  H04N19/91

摘要： An encoding and decoding apparatus and method which has the primary benefit over the prior art of not requiring storage of the nonlinear sequence of numbers representative of the quantization characteristics. The hardware required for quantization is reduced and inverse quantization may be achieved using shifting operations and a multiplier of up to half the scale compared to conventional encoding/decoding methods and encoding/decoding apparatus.

摘要翻译： 一种编码和解码装置和方法，其具有不需要存储代表量化特性的非线性序列序列的现有技术的主要益处。 与传统的编码/解码方法和编码/解码装置相比，减少了量化所需的硬件，并且可以使用移位操作和高达一半的倍数来实现逆量化。

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。