HDTV TRICK PLAY STREAM DERIVATION FOR PRE-RECORDED DIGITAL VIDEO RECORDING FOR PRE-RECORDED DIGITAL VIDEO RECORDING

摘要

The consumer digital video cassette recorder 210 of the present invention is capable of recording advanced television signals having a signal format such as MPEG. The predictive property of a signal format such as MPEG requires that additional I-frame data be generated and recorded with a data rate 09 of standard play speed to facilitate non-standard rate reproduction or trick play reproduction. Additional I-frame data streams 521, 531, and 541 are generated specifically for each playback speed and are recorded in the recorded tracks to facilitate playback at a given rate. A variety of methods for the derivation of trick play data streams of full resolution and reduced resolution are disclosed. Real-time recording by a consumer device and generation of a trick play data stream of the present invention for non-real-time standard and trick play data stream generation for use with pre-recorded digital media is disclosed.