公开(公告)号：EP0980186A2

公开(公告)日：2000-02-16

申请号：EP99202518.9

申请日：1999-08-02

申请人： NDS LIMITED

发明人： Davies, Colin, Dr. ,  Huggett, Anthony R. ,  Stubbings, Clive A., Dr. ,  Funnell, John S. ,  Murray, Kevin A. ,  Warburton, Richard J.

IPC分类号： H04N7/58 ,  H04N7/24

CPC分类号： H04N21/2365 ,  H04N21/23611 ,  H04N21/2401

摘要： The present invention relates to digital data transmission and more precisely a method and apparatus for managing a decoder buffer.
In data transmission applications, such as digital video broadcasting, large amounts of data are encoded and transmitted to decoders having a decoder buffer. Management of the decoder buffer is very important as transmittal of too little data can result in the decoder buffer underflowing (becoming empty), or if too much data is transmitted the decoder buffer could overflow. Both decoder buffer overflow and underflow result in loss of data and the decoding process is adversely affected.
The present invention provides a method and apparatus for managing a decoder buffer such that decoder buffer overflow and underflow are minimised.

摘要翻译： 本发明涉及数字数据传输，更准确地说，涉及一种用于管理解码器缓冲器的方法和装置。 在诸如数字视频广播的数据传输应用中，大量数据被编码并传送到具有解码器缓冲器的解码器。 解码器缓冲器的管理非常重要，因为传输太少的数据可能导致解码器缓冲器下溢（变空），或者如果发送的数据太多，则解码器缓冲器可能溢出。 解码器缓冲区溢出和下溢均导致数据丢失，解码过程受到不利影响。 本发明提供一种用于管理解码器缓冲器的方法和装置，使得解码器缓冲器溢出和下溢最小化。

公开(公告)号：EP0977435A2

公开(公告)日：2000-02-02

申请号：EP99202249.1

申请日：1999-07-08

申请人： NDS LIMITED

发明人： Funnell, John S. ,  Stubbings, Clive A. ,  Davies, Colin ,  Murray, Kevin A. ,  Warburton, Richard J. ,  Huggett, Anthony R. ,  Trimboy, Neil A.

IPC分类号： H04N7/01

CPC分类号： H04N7/0125

摘要： This invention is related to a method and apparatus for changing picture information from a first format to a second format, wherein the first format has a particular line length and the second format has a different line length. The first format picture is stored sequentially on entry into a store, and retrieved sequentially in the order of entry to provide the picture information in a second format.
The method and apparatus can be used to change picture information having a non-standard format into a format suitable for conveyance across standard components, such as interfaces, readily available for use in picture systems such as television.
Where the method and apparatus are included within digital broadcasting of picture information, and in particular for HDTV processing, then the method and apparatus of the invention can be duplicated to provide a reversal of the change of format. This enables the original first format to be available for further processing within e.g. a standard decoder.

摘要翻译： 本发明涉及一种用于将图像信息从第一格式改变为第二格式的方法和装置，其中第一格式具有特定的行长度，而第二格式具有不同的行长度。 第一格式图像顺序地存储在存储器中，并按照输入顺序依次检索以提供第二格式的图像信息。 该方法和装置可以用于将具有非标准格式的图像信息改变成适合于在诸如电视的图像系统中使用的诸如接口的标准组件之间传送的格式。 在方法和装置包括在图像信息的数字广播内，特别是用于HDTV处理的情况下，可以复制本发明的方法和装置以提供格式变化的逆转。 这使得原始的第一格式可用于例如进一步处理。 一个标准解码器。