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。