Patent ID: 6031959
Filing Date: 2000-02-29
Classification: H04N

Abstract:
A television signal recording apparatus comprising:a related signal extraction means for extracting a related signal which is related to a television signal comprising a video and an audio signal, the related signal extraction means comprises:a common information detection means for detecting all or part of common information which is common to the complete sequence of the video signal, common information which is common within each frame, and common information which is common across plural blocks; anda related signal selection means for selecting the data required as related signals from the common information in each range detected by the common information detection means,flag means for setting a flag indicating whether or not the related signal extracted by said related signal extraction means should be recorded on a recording medium having a plurality of tracks; andrecording means for recording on said recording medium:a) the related signal together with the television signal if the state of said flag indicates the related signal should be recorded; andb) the television signal without the related signal if the state of said flag indicates the related signal should not be recorded;wherein said recording means records a) said television signal in a first portion of said recording medium relative to movement of said medium, and b) said related signal in a second portion of said recording medium relative to movement of said recording medium, anda) wherein said television signal in one of said tracks corresponds to said related signal in more than one of said tracks, and b) said related signal in said more than one of said tracks is derived from the television signal in said one of said tracks.