Video disc having an aspect ratio information and video disc player having an aspect ratio converting function

• US 20020197057A1
• Filed: 08/30/2002
• Published: 12/26/2002
• Est. Priority Date: 09/11/1992
• Status: Active Grant

• Current Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Original Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Inventors: Yokogawa, Fumihiko
• Granted Patent: US 6,968,121 B2
• Time in Patent Office: Days
• US Class Current: 386/232
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/7925 for more than one standard
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

Image information is reproduced in respectively correspondence to monitors of different aspect ratios as in the NTSC system or HDTV system adaptive type. The image information recorded on a video disc is reproduced. An ID signal held in the video disc is detected. The aspect ratio of the image information to be generated is designated. Only when the aspect ratio indicated by the detected ID signal differs from the designated aspect ratio, the reproduced image information is converted into the image information of the designated aspect ratio. A standardized image signal is produced on the basis of the converted image information.

Claims

1. A video disc in which image information has digitally been recorded by a predetermined format having a data block to store at least image data in a program area,

wherein the disc holds an identification signal indicative of an aspect ratio of said image information.

2. A disc according to claim 1, wherein said identification signal has been recorded in a lead-in area of the video disc.

3. A disc according to claim 1, wherein said identification signal has been recorded in a video disc casing.

4. A disc according to claim 1, wherein said identification signal has time-divisionally been multiplexed to the image data.

9. A video disc player having an aspect ratio converting function for reading out the information held in a video disc according to any one of claims 1 to 4 or a video disc on which the information has been recorded by a method according to any one of claims 5 to 8, comprising:

reproducing means for reproducing the image information recorded on the video disc;

detecting means for detecting the identification signal held in the video disc;

designating means for designating an aspect ratio of the image information to be generated; and

image information processing means for converting the image information reproduced by said reproducing means into the image information of the aspect ratio designated by said designating means only in the case where the aspect ratio indicated by the identification signal detected by said detecting means differs from the aspect ratio designated by said designating means, thereby forming an image signal on the basis of the converted image information.

10. A player according to claim 9, wherein said image information processing means comprises:

a decimation filter corresponding to the horizontal and vertical directions of the image for generating data at a predetermined sampling rate lower than that of the input data; and

an interpolating filter corresponding to the horizontal and vertical directions of the image which is generated at a predetermined sampling rate higher than that of the input data,

and wherein in the case where the aspect ratio by said detecting means differs from the aspect ratio by said designating means, the image information reproduced by said reproducing means is supplied to either one of said decimation filter and said interpolation filter.

5. A recording method of recording image information by a predetermined format having a data block to store at least image data in a program area of a video disc,

wherein an identification signal indicative of an aspect ratio of the image information is held in said video disc.

6. A method according to claim 5, wherein said identification signal is recorded in a lead-in area of the video disc.

7. A method according to claim 5, wherein said identification signal is recorded on a video disc casing.

8. A method according to claim 5, wherein said identification signal is time-divisionally multiplexed to the image data and is recorded.