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    • 1. 发明授权
    • Apparatus, method and computer program product for transcoding a coded moving picture sequence
    • 用于对编码的运动图像序列进行代码转换的装置,方法和计算机程序产品
    • US06587508B1
    • 2003-07-01
    • US09604973
    • 2000-06-28
    • Tsuyoshi HanamuraHiroyuki KasaiSatoshi NishimuraHideyoshi Tominaga
    • Tsuyoshi HanamuraHiroyuki KasaiSatoshi NishimuraHideyoshi Tominaga
    • H04B166
    • H04N19/40H04N19/124H04N19/149H04N19/152H04N19/172H04N19/176H04N19/61
    • An apparatus for transcoding a coded moving picture sequence according to the present invention comprises a rate controller for adapting the scaling factor to perform the rate control over the coded moving picture sequence signal having a desired target bit rate. The rate controller of the apparatus has: a remaining bit computing unit for computing: a remaining number of inputting bits Rin(n) for each of the pictures in the first coded moving picture sequence signal on the basis of the number of real inputting bits Sin(n) of the current picture and the estimated number of inputting bits; and a remaining number of outputting bits Rout(n) for each of the pictures in the second coded moving picture sequence signal on the basis of the number of real outputting bits Sout(n) of the current picture and the estimated number of outputting bits; a target ratio computing unit for computing, for each of the pictures, a target ratio of the remaining number of outputting bits Rout(n) to the remaining number of inputting bits of the picture Rin(n); and a scaling factor computing unit for computing the scaling factor on the basis of the target ratio to control the target bit rate of the second coded moving picture sequence signal.
    • 根据本发明的用于对编码运动图像序列进行代码转换的装置包括速率控制器,用于调整比例因子以对具有期望目标比特率的编码运动图像序列信号执行速率控制。 该装置的速率控制器具有:剩余比特计算单元,用于计算:基于实际输入比特数Sin的第一编码运动图像序列信号中的每个图像的输入比特Rin(n)的剩余数量 (n)和估计的输入位数; 以及基于当前图像的实际输出位Sout(n)的数量和所估计的输出比特数,在第二编码运动图像序列信号中的每个图像的输出比特Rout(n)的剩余数量; 目标比率计算单元,用于针对每个图像计算剩余输出比特数Rout(n)与图片Rin(n)的剩余输入比特数的目标比率; 以及比例因子计算单元,用于基于所述目标比率来计算所述缩放因子,以控制所述第二编码运动图像序列信号的目标比特率。
    • 2. 发明授权
    • Apparatus, method and computer program product for transcoding a coded multiplexed sound and moving picture sequence
    • 用于对编码多路复用声音和运动图像序列进行代码转换的装置,方法和计算机程序产品
    • US06654421B2
    • 2003-11-25
    • US09793630
    • 2001-02-27
    • Tsuyoshi HanamuraSeiji OzakiSatoshi NishimuraHiroyuki KasaiHideyoshi Tominaga
    • Tsuyoshi HanamuraSeiji OzakiSatoshi NishimuraHiroyuki KasaiHideyoshi Tominaga
    • H04N712
    • H04N21/23608H04N19/40H04N19/48H04N19/90H04N21/2343H04N21/234354
    • Herein disclosed is an apparatus for transcoding a coded multiplexed sound and moving picture sequence comprises the rate converter, which is operated to compress only the video bit streams, which have extremely large information volume. The compression operation is carried out through the steps of (a) operating the MPEG-2 TS demultiplexer to demultiplex the input MPEG-2 transport streams into video TS, audio TS, and system information TS; (b) operating the MPEG-2 video transcoder to transcode the video TS to generate output video TS having information volume less than the video TS; (c) operating the system controller to modify or not modify part of fixed codes of the system information TS in accordance with the output MPEG-2 transport streams; (d) operating the MPEG-2 TS multiplexer to multiplex the video TS thus transcoded, the audio TS, and the eventually partly-modified or not modified system information TS into output MPEG-2 transport streams, and output the output MPEG-2 transport streams, thereby making it possible to control the output bit rate less than the input bit rate.
    • 这里公开了一种用于对编码的多路复用声音进行代码转换的装置,并且运动图像序列包括速率转换器,其被操作以仅压缩具有非常大的信息量的视频比特流。 通过以下步骤进行压缩操作:(a)操作MPEG-2TSM解复用器,将输入的MPEG-2传输流解复用为视频TS,音频TS和系统信息TS; (b)操作MPEG-2视频代码转换器以对视频TS进行转码以产生具有小于视频TS的信息量的输出视频TS; (c)根据输出的MPEG-2传输流操作系统控制器修改或不修改系统信息TS的固定码的一部分; (d)操作MPEG-2 TS多路复用器将经转码的视频TS,音频TS和最终部分修改或未修改的系统信息TS复用成输出MPEG-2传输流,并输出MPEG-2传输 流,从而使得可以控制小于输入比特率的输出比特率。
    • 5. 发明申请
    • Apparatus, system for, method of and computer program product for separating and merging coded signal
    • 用于分离和合并编码信号的装置,系统,方法和计算机程序产品
    • US20060171463A1
    • 2006-08-03
    • US10547010
    • 2004-02-20
    • Tsuyoshi HanamuraIsao NagayoshiHideyoshi Tominaga
    • Tsuyoshi HanamuraIsao NagayoshiHideyoshi Tominaga
    • H04N11/04
    • H04N21/2662H04N19/36H04N19/40H04N21/234327
    • Herein disclosed is a bit stream separating and merging system comprising a bit stream separating apparatus (1000) for inputting and transcoding an original bit stream A to separate into and generate a base bit stream B and one or more extended differential bit streams E*, each having a partial differential information segment between the original bit stream A and the base bit stream B, and a bit stream merging apparatus (2000) for inputting and merging the base bit stream B and the one or more extended differential bit streams E* to reconstruct the original bit stream A or a pseudo original bit stream B* approximately similar to the original bit stream A. The bit stream separating and merging system thus constructed makes it possible for a user to receive the one or more extended differential bit streams E* at respective bit rates each lower than that of original bit stream A to reconstruct the original bit stream A or the pseudo original bit stream B* in combination with the base bit stream B already received or stored.
    • 这里公开了一种比特流分离和合并系统,其包括用于输入和代码转换原始比特流A以分离并生成基本比特流B和一个或多个扩展差分比特流E *的比特流分离装置(1000) 在原始比特流A和基本比特流B之间具有偏差信息分段,以及用于输入和合并基本比特流B和一个或多个扩展差分比特流E *的比特流合并装置(2000),以重构 原始比特流A或与原始比特流A大致相似的伪原始比特流B *。如此构造的比特流分离和合并系统使得用户可以在一个或多个扩展差分比特流E *处接收 相应的比特率分别低于原始比特流A的比特率,以与原始比特流A的组合重建原始比特流A或伪原始比特流B * 已经接收或存储的位流B。