公开(公告)号：US06470142B1

公开(公告)日：2002-10-22

申请号：US09435967

申请日：1999-11-08

申请人： Masaaki Isozaki ,  Yoshio Oyone

发明人： Masaaki Isozaki ,  Yoshio Oyone

IPC分类号： H04N5926

CPC分类号： H04N9/8066 ,  H04N9/7925 ,  H04N9/8042 ,  H04N9/885

摘要： A data recording and reproducing apparatus for recording and reproducing video signals in a plurality of formats with different rates to/from a record medium is disclosed. In the data recording and reproducing apparatus, a video signal in a selected format is converted into video data packets and audio data packets whose lengths are optimally designated corresponding to the selected format. With a video data packet and an audio data packet, a video sync block and an audio sync block whose lengths are different are formed, respectively. The video sync block and the audio sync block are encoded with respective error correction codes. The resultant data is recorded as record data to a record medium. Corresponding to the data rate of the video signal, at least one data packet is placed in one video sync block. A synchronization detecting apparatus automatically and accurately detects sync blocks with different lengths from a data sequence of record data reproduced from a record medium. The synchronization detecting apparatus separates the detected sync blocks into video sync blocks and audio sync blocks. The video sync blocks and the audio sync blocks are decoded with respective error correction codes. As a result, video data and audio data are restored.

摘要翻译： 公开了一种数据记录和再现装置，用于记录和再现具有与记录介质不同的速率的多种格式的视频信号。 在数据记录和再现装置中，所选格式的视频信号被转换成视频数据包和音频数据包，其长度根据所选格式被最佳地指定。 利用视频数据包和音频数据包，分别形成长度不同的视频同步块和音频同步块。 视频同步块和音频同步块用相应的纠错码进行编码。 所得到的数据作为记录数据记录到记录介质。对应于视频信号的数据速率，至少一个数据包被放置在一个视频同步块中。一个同步检测装置自动且准确地检测不同长度的同步块 从记录介质再现的记录数据的数据序列。 同步检测装置将检测到的同步块分离成视频同步块和音频同步块。 视频同步块和音频同步块用相应的纠错码解码。 结果，视频数据和音频数据被恢复。