US 5,191,431 A · Recording apparatus having plural operating modes involving diverse signal compression rates and different apportioning of pilot signal recording area

Abstract

An information recording apparatus comprises a signal compression unit responsive to a mode changeover signal for changing over the compression rate of input digital information between first and second compression rates, the second compression rate being higher than said first compression rate, a unit for generating a tracking-control pilot signal, a recording unit for recording the digital information compressed by said compressing unit and the pilot signal on a recording medium while forming a number of recording tracks, and a mode changeover unit for generating the mode changeover signal for changing over an operating mode of the apparatus between a plurality of modes, the plurality of modes including: a first mode in which the compressing unit compresses the digital information at the first compression rate and the recording unit sets the proportion of a recording area of the pilot signal to the entirety of the recording track to a first ration; and a second mode in which the compressing unit compresses the digital information at the second compression rate and the recording unit sets the proportion of a recording area of the pilot signal to the entirety of the recording track to a second ratio, the second ratio being higher than the first ratio.

Claims15

Dependent claims

An information recording apparatus comprising:

(a) compressing means for compressing digital information, said compressing means being responsive to a mode changeover signal for changing over the compression rate of the digital information between at least first and second compression rates, said second compression rate being higher than said first compression rate;
(b) generating means for generating a tracking-control pilot signal;
(c) recording means for recording the digital information compressed by said compressing means and the pilot signal on a recording medium while forming a number of recording tracks;
and
(d) mode changeover means for generating said mode changeover signal for changing over an operating mode of said apparatus between a plurality of modes, said plurality of modes including:
a first mode in which said compressing means compresses the digital information at said first compression rate and said recording means sets the proportion of a recording area of the pilot signal to the entirety of the recording track to a first ratio;
and a second mode in which said compressing means compresses the digital information at said second compression rate and said recording means sets the proportion of a recording area of the pilot signal to the entirety of the recording track to a second ratio, said second ratio being higher than the first ratio.

4 more elements

A video information recording apparatus comprising:

(a) compressing means for compressing digital video information, said compressing means being responsive to a mode changeover signal for changing over the compression rate of the digital video information in units of a picture between at least first and second compression rates, said second compression rate being higher than said first compression rate;
(b) generating means for generating a tracking-control pilot signal;
(c) recording means for recording the digital video information compressed by said compressing means and the pilot signal on a recording medium while forming a number of recording tracks;
and
(d) mode changeover means for generating said mode changeover signal for changing over an operating mode of said apparatus between a plurality of modes in units of a picture of the digital video information, said plurality of modes including:
a first mode in which said compressing means compresses the digital video information at said first compression rate and said recording means provides i recording areas for the pilot signal in each of a predetermined number of tracks among a plurality of recording tracks in which digital video information for one picture is recorded, where i is an integer;
and a second mode in which said compressing means compresses the digital information at said second compression rate and said recording means provides j recording areas for the pilot signal in each of a predetermined number of tracks among a plurality of recording tracks in which digital video information for one picture is recorded, where j is a integer larger than i.

4 more elements

Dependencies are inferred from the claim text.

Recording apparatus having plural operating modes involving diverse signal compression rates and different apportioning of pilot signal recording area

Life of this patent

Recording apparatus having plural operating modes involving diverse signal compression rates and different apportioning of pilot signal recording area

Life of this patent

Abstract

Claims15