Apparatus and method for recording image signals to allow reproduction at ...

[54] APPARATUS AND METHOD FOR

RECORDING IMAGE SIGNALS TO ALLOW
REPRODUCTION AT MORE THAN ONE
DATA RATE

[75] Inventors: Takao Takahashi, Tokyo; Hiroshi
Kobayashi, Chiba, both of Japan

[73] Assignee: Sony Corporation, Tokyo, Japan

[21] Appl. No.: 783,993

[22] Filed: Oct. 29,1991

[30] Foreign Application Priority Data

Nov. 16, 1990 [JP] Japan 2-308515

[51] Int. CI.' H04N 5/76; H04N 5/783

[52] U.S. CI 358/335; 360/33.1

[58] Field of Search 358/335, 906, 310, 330,

358/133, 134; 360/32, 33.1, 35.1

[56] References Cited

U.S. PATENT DOCUMENTS

4,633,330 12/1986 Yamamitsu et al 358/310

4,682,250 7/1987 Hirota 358/310

4,730,222 3/1988 Schauffele .' 358/335

4,819,059 4/1989 Pape 358/310

4,858,026 8/1989 Richards 358/310

4,858,032 8/1989 Okada et al 358/335

4,862,292 8/1989 Enari et al 358/335

4,977,454 12/1990 Tsinberg 358/141

4,9*4,094 1/1991 Emori 358/335

5,068,744 11/1991 Ito 358/335

5,119,208 6/1992 Fujimoto 358/310

Image signal recording apparatus and methods are provided for recording first and second image data on a record medium wherein the first image data are obtained through sampling of image signals at a first data rate and the second image data have a second data rate lower than the first data rate such that the second image data may be reproduced by apparatus operating at the second data rate. The second image data are formed from the first image data and recorded together with at least a portion of the first image data in predetermined areas of the recording medium. The portion of the first image data recorded on the recording medium is selected such that the first image data may be derived by reproducing apparatus operating at the first data rate from the second image data and the portion of the first image data. Area discriminating codes are recorded on the recording medium for identifying the predetermined areas in which the second image data and the portion of the first image data are recorded.

24 Claims, 16 Drawing Sheets