公开(公告)号：EP0948214A2

公开(公告)日：1999-10-06

申请号：EP99200584.3

申请日：1999-03-02

申请人： NDS LIMITED

发明人： Murray, Kevin Alistair ,  Davies, Colin ,  Stubbings, Clive Anthony ,  Huggett, Anthony Richard ,  Warburton, Richard John ,  Funnel, John Stuart

IPC分类号： H04N7/62

CPC分类号： H04N19/61 ,  H04N19/00 ,  H04N19/70

摘要： The present invention relates to the detection of a predetermined sequence in a digital bit-stream, and more particularly a method and apparatus for the fast and efficient detection of a start code sequence.
As with many packet based bit-streams, packets are identified through the use of a start code. The start code is a unique sequence which occurs only to indicate the start of a packet, and can never occur in the data portion of a bit-stream. Identifying the start of packets is crucial in the processing of packetised bit-streams.
In the field of digital broadcasting, a common format of digital video compression is that of the Moving Picture Expert Group (MPEG). MPEG uses a packetised bit-stream and packets are preceded by a start code to enable individual packets to be identified. In any real-time processing of MPEG bit-streams, it is vital to be able to identify the MPEG start codes as quickly and efficiently as possible. Performing this in hardware is a relatively straightforward operation. Detecting start codes using software is also straightforward in a non real-time situation. However, where an end-to-end real-time software solution is required to process MPEG data it may not be possible or desirable to use a hardware-based solution.
The present invention overcomes the problems of the prior art and provides a method and apparatus for the fast and efficient detection of the MPEG start code sequence.

摘要翻译： 本发明涉及对数字比特流中的预定序列的检测，更具体地说，涉及用于快速高效地检测起始码序列的方法和装置。 与许多基于分组的比特流一样，通过使用起始码来识别分组。 起始码是一个唯一的序列，它只发生在一个数据包的起始位置，并且不会发生在位流的数据部分。 识别分组的开始在分组化比特流的处理中是至关重要的。 在数字广播领域，数字视频压缩的通用格式是运动图像专家组（MPEG）。 MPEG使用分组化的比特流，并且分组之前是开始码，以使得能够识别各个分组。 在MPEG比特流的任何实时处理中，能够尽可能快速有效地识别MPEG起始码至关重要。 在硬件中执行此操作是相对简单的操作。 使用软件检测起始码在非实时情况下也是直接的。 然而，在需要端到端实时软件解决方案来处理MPEG数据的情况下，使用基于硬件的解决方案可能是不可能或不可取的。 本发明克服了现有技术的问题，并且提供了一种用于快速高效地检测MPEG起始码序列的方法和装置。

公开(公告)号：EP0948214A3

公开(公告)日：2000-03-15

申请号：EP99200584.3

申请日：1999-03-02

申请人： NDS LIMITED

发明人： Murray, Kevin Alistair ,  Davies, Colin ,  Stubbings, Clive Anthony ,  Huggett, Anthony Richard ,  Warburton, Richard John ,  Funnel, John Stuart

IPC分类号： H04N7/62 ,  H04N7/50 ,  H04N7/30

CPC分类号： H04N19/61 ,  H04N19/00 ,  H04N19/70

摘要： The present invention relates to the detection of a predetermined sequence in a digital bit-stream, and more particularly a method and apparatus for the fast and efficient detection of a start code sequence. As with many packet based bit-streams, packets are identified through the use of a start code. The start code is a unique sequence which occurs only to indicate the start of a packet, and can never occur in the data portion of a bit-stream. Identifying the start of packets is crucial in the processing of packetised bit-streams. In the field of digital broadcasting, a common format of digital video compression is that of the Moving Picture Expert Group (MPEG). MPEG uses a packetised bit-stream and packets are preceded by a start code to enable individual packets to be identified. In any real-time processing of MPEG bit-streams, it is vital to be able to identify the MPEG start codes as quickly and efficiently as possible. Performing this in hardware is a relatively straightforward operation. Detecting start codes using software is also straightforward in a non real-time situation. However, where an end-to-end real-time software solution is required to process MPEG data it may not be possible or desirable to use a hardware-based solution. The present invention overcomes the problems of the prior art and provides a method and apparatus for the fast and efficient detection of the MPEG start code sequence.

公开(公告)号：EP0948207A1

公开(公告)日：1999-10-06

申请号：EP99200581.9

申请日：1999-03-02

申请人： NDS LIMITED

发明人： Murray, Kevin Alistair ,  Davies, Colin ,  Bock, Alois Martin ,  Huggett, Anthony Richard ,  Funnel, John Stuart ,  Warburton, Richard John ,  Stubbings, Clive Anthony

IPC分类号： H04N7/26

CPC分类号： H04N19/436 ,  H04N19/30

摘要： The present invention relates to digital television, and in particular the encoding of high-definition television (HDTV).
Standard digital television pictures have a resolution of 480 x 704 pixels and display at 30 frames per second. High definition television (HDTV) differs from standard television in having a much higher resolution.
The generation of digitally compressed HDTV signals requires dedicated encoding equipment due to the high sampling rates used for HDTV signals. Consequently, due to their increased complexity, HDTV encoders are substantially more complex and expensive than standard TV encoders.
A standard television encoder is not capable of encoding a HDTV image due to the increased resolution and the much larger data rates associated with such large images which is outside of capacity of a standard television encoder.
The present invention overcomes these problems and provides a method and apparatus for creating HDTV signals using predominantly standard television equipment.

摘要翻译： 本发明涉及数字电视，特别涉及高分辨率电视（HDTV）的编码。 标准数字电视图像的分辨率为480×704像素，每秒30帧显示。 高分辨率电视（HDTV）与标准电视的分辨率不同。 数字压缩的HDTV信号的产生由于用于HDTV信号的高采样率而需要专用的编码设备。 因此，由于HDTV编码器的复杂性越来越高，比标准电视编码器要复杂得多。 标准电视编码器由于分辨率的增加而不能编码HDTV图像，并且与标准电视编码器容量之外的这种大图像相关联的数据速率大得多。 本发明克服了这些问题，并且提供了使用主要标准的电视设备来创建HDTV信号的方法和装置。

公开(公告)号：EP0948209A2

公开(公告)日：1999-10-06

申请号：EP99200583.5

申请日：1999-03-02

申请人： NDS LIMITED

发明人： Davies, Colin ,  Murray, Kevin Alistair ,  Bock, Alois Martin ,  Huggett, Anthony Richard ,  Funnel, John Stuart ,  Warburton, Richard John ,  Stubbings, Clive Anthony

IPC分类号： H04N7/26

CPC分类号： H04N19/436 ,  H04N19/30

摘要： According to one aspect of the present invention there is provided a digital television system comprising: a splitter for splitting a television image into a spatial array of elements; a plurality of encoders for encoding each of the elements; a combiner for re-combining the encoded elements such that they are capable of regenerating the television image.
This has a number of advantages over the prior art. In particular the invention provides a real time, efficient, cost effective HDTV system which can support both HD and SD programming.

摘要翻译： 根据本发明的一个方面，提供了一种数字电视系统，包括：分离器，用于将电视图像分割成空间阵列的元素; 用于编码每个元件的多个编码器; 组合器，用于重新组合编码的元件，使得它们能够再生电视图像。 与现有技术相比，这具有许多优点。 特别地，本发明提供了可以支持HD和SD编程的实时，高效，成本有效的HDTV系统。

公开(公告)号：EP0948208A1

公开(公告)日：1999-10-06

申请号：EP99200582.7

申请日：1999-03-02

申请人： NDS LIMITED

发明人： Davies, Colin ,  Murray, Kevin Alistair ,  Huggett, Anthony Richard ,  Bock, Alois Martin ,  Funnel, John Stuart ,  Trimboy, Neil Adrian ,  Pledge, Jonathan George William ,  Warburton, Richard John ,  Stubbings, Clive Anthony

IPC分类号： H04N7/26

CPC分类号： H04N19/436 ,  H04N19/30 ,  H04N19/61

摘要： According to one aspect of the present invention there is provided a digital television system of the type comprising a splitter for splitting a television image into a spatial array of elements; a plurality of encoders for encoding each of the elements; a combiner for re-combining the encoded elements such that they are capable of regenerating the television image; wherein the television system further includes a co-ordinator which spatially and temporally arranges the encoded elements such that the combiner can recombine the elements to be in the correct position spatially and temporally.
This has a number of advantages over the prior art. In particular the invention provides the advantage that the system is fully synchronised and then the recombiner can accurately put together the elements so as to produce an encoded version of the original image.

摘要翻译： 根据本发明的一个方面，提供了一种数字电视系统，其类型包括用于将电视图像分割成空间阵列的分离器; 用于编码每个元件的多个编码器; 组合器，用于重新组合编码的元素，使得它们能够再生电视图像; 其中所述电视系统还包括协调器，所述协调器在空间和时间上布置所编码的元件，使得所述组合器可以将所述元件在空间和时间上重新组合成正确的位置。 与现有技术相比，这具有许多优点。 特别地，本发明提供了该系统完全同步的优点，然后重组器可以准确地将元件放在一起，以便产生原始图像的编码版本。