Recording apparatus and reproducing apparatus

• US 20020146240A1
• Filed: 07/20/2001
• Published: 10/10/2002
• Est. Priority Date: 02/02/1994
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ogawa, Tetsuo, Kotani, Hiroki
• Granted Patent: US 7,058,288 B2
• Time in Patent Office: Days
• US Class Current: 386/109
• CPC Class Codes: G11B 15/125 conditioned by the operating function of the apparatus
• CPC Class Codes: G11B 15/4673 by controlling the speed of the tape while the head is rotating
• CPC Class Codes: G11B 15/4675 with provision for information tracking
• CPC Class Codes: G11B 15/52 by using signals recorded on, or derived from, record carrier
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2020/00079 the compression ratio or quality level being adapted to circumstances, e.g. to the available recording space
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/323 Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
• CPC Class Codes: H04N 5/9261 involving data reduction

Abstract

It is an object of the present invention to provide a recording apparatus and a reproducing apparatus which change a picture compression rate depending upon a picture quality of a source which a user desires to retain, thereby a tape storage space being secured. A video-data compression rate N used by a 1:N video-data compression encoder 3 and a 1:N video-data compression decoder 6 is changed depending upon a picture quality set by a device 5 for setting a picture quality that a user desires. A tape travel speed of an archive VTR 4 is changed in response to the picture compression rate. Thus, an amount of a tape travel is optionally set depending upon a level of the picture quality. Therefore, it is possible to optionally select a tape storage space in response to the level of the picture quality.

Claims

1. A recording apparatus being characterized by comprising:

a video-data supply means for supplying a video data;

a compression means for compressing said video data;

a setting means for setting a compression rate used in said compression means;

a control means for controlling a travel speed of a recording medium so that said recording medium should be traveled at a speed corresponding to said compression rate set by said setting means; and

a recording means for recording said video data compressed by said compression means on said recording medium.

2. A recording apparatus according to claim 1, characterized in that said control means controls a speed of said recording medium so that a value of the compression rate set by said setting means and the speed of said recording medium should be in proportion to each other.

3. A recording apparatus according to claim 2, characterized in that said control means controls the speed of said recording medium so that, when the compression rate set by said setting means is an inverse number of N (where N>

1), the speed of said recording medium should be set to a speed multiplied by an inverse number of N.

4. A recording apparatus according to claim 1, characterized in that said recording means records a compression rate data indicating said video-data compression rate at said compression means on said recording medium.

5. A recording apparatus according to claim 1, characterized in that said recording means records a compression rate data indicating a compression rate of said video data at said recording means on said recording medium.

6. A recording apparatus according to claim 1, characterized in that said recording means records a source ID data indicating said video data on said recording medium.

7. A recording apparatus according to claim 1, characterized in that said video-data supply means supplies a plurality of video data and said recording means records said plurality of video data compressed by said compression means on respective channels of said recording medium.

8. In a reproducing apparatus for reproducing a video data from a recording medium on which said video data and a travel-speed data indicating a travel speed of a recording medium obtained when said video data is recorded thereon are recorded,

said reproducing apparatus being characterized by comprising:

a reproducing means for reproducing said video data and said travel-speed data from said recording medium;

a control means for controlling a travel speed of said recording medium so that said recording medium should be traveled at a travel speed corresponding to said reproduced travel-speed data; and

an expanding means for expanding said reproduced video data at an expansion rate corresponding to said travel speed data.