公开(公告)号：US20020001344A1

公开(公告)日：2002-01-03

申请号：US09855115

申请日：2001-05-14

Applicant: U.S PHILIPS CORPORATION

Inventor： Octavius J. Morris ,  Wilhelmus H.A. Bruls

IPC: H04N007/12

CPC classification number: H04N21/23406 ,  H04N21/44004

Abstract: A method of, and apparatus for, encoding and multiplexing a digital video picture are provided using intra-coded fields only at a relatively high bit-rate, with each picture being encoded as a sequence of slices from the video image field. The encoding suitably complies with MPEG or similar requirements, and the intra-coding is further constrained so that the maximum number of bits for each slice in the picture is limited, and the delivery schedule of the bits to a decoder is more tightly constrained than is implied by the MPEG decoding models. In this way it is possible to build a high quality, low cost MPEG (or similar) encoder and decoder for video communications over digital interconnection standards such as IEEE 1394.

Abstract translation: 仅使用相对较高比特率的帧内编码字段来提供编码和复用数字视频图像的方法和装置，每个图像被编码为来自视频图像场的片段序列。 编码适当地符合MPEG或类似要求，并且帧内编码被进一步约束，使得图像中每个片的最大位数受到限制，并且比特到解码器的传送调度比 由MPEG解码模式暗示。 以这种方式，可以通过诸如IEEE 1394的数字互连标准来构建用于视频通信的高质量，低成本的MPEG（或类似的）编码器和解码器。

公开(公告)号：US20010007568A1

公开(公告)日：2001-07-12

申请号：US09749733

申请日：2000-12-27

Applicant: U.S. PHILIPS CORPORATION

Inventor： Octavius J. Morris

IPC: H04J003/24

CPC classification number: H04N21/4344 ,  G11B27/034 ,  G11B27/10 ,  G11B27/105 ,  G11B27/107 ,  G11B27/3027 ,  G11B2220/20 ,  G11B2220/90 ,  H04N5/775 ,  H04N9/8042 ,  H04N21/23406 ,  H04N21/4147 ,  H04N21/44004

Abstract: A digital video recorder or similar apparatus implements a method of converting an input data stream having an MPEG-2 Program Stream (PS) format into an output data stream having an MPEG-2 Transport Stream (TS) format. The input data stream (PS) includes data of at least first and second elementary data streams (404, 406) formed and multiplexed in compliance with a PS decoder model. A scheduler (412) within the apparatus inhibits reading of a further data block from the input stream when, in the absence of a vacancy for data of an audio elementary stream within a target decoder model (418), a clock reference (SCR) of said input data stream advances beyond a clock reference of said output data stream by a predetermined waiting threshold.

Abstract translation: 数字视频记录器或类似装置实现将具有MPEG-2节目流（PS）格式的输入数据流转换为具有MPEG-2传输流（TS）格式的输出数据流的方法。 输入数据流（PS）包括根据PS解码器模型形成和复用的至少第一和第二基本数据流（404,406）的数据。 当在目标解码器模型（418）内没有用于音频基本流的数据的空缺的情况下，该设备内的调度器（412）禁止从输入流读取另外的数据块，时钟参考（SCR） 所述输入数据流超过所述输出数据流的时钟参考预定等待阈值。

公开(公告)号：US20010036355A1

公开(公告)日：2001-11-01

申请号：US09817104

申请日：2001-03-26

Applicant: U.S. Philips Corporation

Inventor： Declan P. Kelly ,  Pieter B. Ijdens ,  Octavius J. Morris

IPC: H04N005/93 ,  H04N007/26 ,  G11B027/00

CPC classification number: H04N21/44016 ,  G11B27/034 ,  G11B27/105 ,  G11B2220/2562 ,  H04N5/04 ,  H04N5/4401 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042 ,  H04N21/4305 ,  H04N21/4325 ,  H04N21/8455

Abstract: Various methods are disclosed for producing an edited MPEG audio/video stream from first and second streams recorded in a transport-stream format normally intended for broadcast purposes. According to one implementation, a bridge sequence is generated which recodes data from both of the original streams, in the region of the edit point. Padding packets are inserted in the elementary streams to adjust a continuity counter values so as to allow continuous decoding across the join between bridge sequence and second sequence proper. In another implementation, seamless playback is not required, the bridge sequence is omitted, and various process are implemented nullon-the-flynull to generate an edited stream compliant with MPEG-2 specification. To this end, exit and entry points are constrained to certain types of coded pictures, and offset between time-bases is adjusted to avoid buffer overflow.

Abstract translation: 公开了用于从通常用于广播目的的传输流格式记录的第一和第二流产生编辑的MPEG音频/视频流的各种方法。 根据一个实现，生成在编辑点的区域中重新编码来自两个原始流的数据的桥接序列。 填充数据包被插入到基本流中以调整连续性计数器值，以允许在桥序列和第二序列之间的连接上的连续解码。 在另一实现中，不需要无缝重放，省略了桥接序列，并且“即时”实现各种处理，以生成符合MPEG-2规范的编辑流。 为此，退出和入口点被约束到某些类型的编码图像，并且调整时基之间的偏移以避免缓冲器溢出。

公开(公告)号：US20010009548A1

公开(公告)日：2001-07-26

申请号：US09741977

申请日：2000-12-20

Applicant: U.S. Philips Corporation

Inventor： Octavius J. Morris

IPC: H04L012/28

CPC classification number: H04N21/4147 ,  H04N9/8042 ,  H04N9/8063 ,  H04N21/4305 ,  H04N21/4334 ,  H04N21/434 ,  H04N21/4344

Abstract: A digital video recorder or similar apparatus implements a method of converting an input data stream having an MPEG-2 Transport Stream (TS) format into an output data stream having an MPEG-2 Program Stream (PS) format. The input data stream (TS) includes data of at least first and second elementary data streams (404, 406) formed and multiplexed in compliance with a TS decoder model. The first elementary stream is a video stream, while the second stream is an audio stream of lower data rate. The input stream is parsed (402) and the elementary streams are demultiplexed into respective FIFO queues 404/406. Each stream is further parsed to obtain and calculate time stamp information which is queued separately at (408/410) with pointers to the stream data (at 404/406). The schedule and packetisation applied to the elementary streams in the input stream (TS) cannot be applied directly in creating the output stream (PS). However, based on parameters and constraints imposed upon the input stream by the MPEG or other specifications, a remultiplexer 412 is able to reschedule and repacketise the elementary data streams into a valid output stream (TS), without the size of buffer that would be required for multiplexing of the elementary streams from scratch.

Abstract translation: 数字录像机或类似装置实现将具有MPEG-2传输流（TS）格式的输入数据流转换为具有MPEG-2节目流（PS）格式的输出数据流的方法。 输入数据流（TS）包括根据TS解码器模型形成和复用的至少第一和第二基本数据流（404,406）的数据。 第一基本流是视频流，而第二流是较低数据速率的音频流。 对输入流进行解析（402），并将基本流解复用到相应的FIFO队列404/406中。 进一步分析每个流以获得并计算在（408/410）处分别排队的时间戳信息，其中指针指向流数据（在404/406）。 应用于输入流（TS）中的基本流的调度和分组化不能直接应用于创建输出流（PS）。 然而，基于通过MPEG或其他规范对输入流施加的参数和约束，重新多路复用器412能够将基本数据流重新调度和重新分组成有效输出流（TS），而不需要缓冲器的大小 用于从头开始复用基本流。