Picture accurate edit without decoding and re-encoding of mpeg bitstream for recordable DVD

Abstract

A method and device for editing to a picture a group of pictures (GOP) in a DVD media without decoding and encoding of an MPEG encoded signal. The method includes the steps of: marking a user selected end picture to identify a selected segment of the encoded signal to be edited; automatically identifying an actual end picture for the selected segment based on a position of the user selected end picture relative to at least one other picture within the encoded signal; and performing an edit function on an actual segment delimited by the actual end picture.

Description

technical field [0001] The present invention generally relates to a method for providing advanced operational functions to audio programs, video programs and both audio and video programs recorded on disc media such as recordable digital video discs, hard disks, and magneto-optical discs and device. Background technique [0002] Various devices have been developed that enable customers to record video and / or audio programs for later playback. Such devices include tape recorders, video tape recorders, recordable compact discs, and most commonly, recordable digital video discs (DVDs). Hard disks and magneto-optical disks are also used. [0003] A record-once DVD is essentially a DVD read-only memory, acronym DVD-R. The acronym DVD-R can also generally refer to write-once, or record-once technology. There are several formats that can be used for recording, erasing or re-recording of DVDs; ie overwrite or rewrite. These are denoted by the acronyms D...

AI Technical Summary

Problems solved by technology

Regardless of the exact GOP structure used, such B pictures cannot be properly decoded without adjacent I and P pictures, so B pictures cannot be accessed at will

Likewise, a P-picture cannot be properly decoded without referring to the immediately preceding I-picture in the bitstream.

This difficulty poses particular problems using editing functions on recordable DVDs, since it means that certain pictures within the bitstream cannot be executably separated from adjacent pictures.

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