Wide picture video recording/reproducing system

• US 5,528,433 A
• Filed: 11/21/1991
• Issued: 06/18/1996
• Est. Priority Date: 11/21/1990
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Masuda, Michio, Yoshioka, Atsushi, Itoh, Shigeyuki, Aizawa, Iwao
• Primary Examiner(s): Sniezek, Andrew L.
• Application Number:
  US07/795,467
• Time in Patent Office: 1,671 Days
• Field of Search: 360/14.1, 360/14.2, 360/25, 360/27, 360/19.1, 360/35.1, 360/18, 360/33.1, 360/64, 358/180, 358/310, 358/335, 358/342, 348/445
• US Class Current: 386/316
• CPC Class Codes: H04N 5/928 the sound signal being pulse code modulated and recorded in time division multiplex with the modulated video signal
• CPC Class Codes: H04N 9/7925 for more than one standard

Abstract

A video tape recorder enables a normal video signal for an aspect ratio of 4:3 or a wide-picture video signal for a greater aspect ratio of, for example, 16:9 to be selectively recorded/reproduced onto and from a magnetic tape. In order to identify which of the aspect ratios the reproduced video signal is based on, a recording mode signal indicative of the aspect ratio is recorded on the magnetic tape together with the video signal. A code signal or a pilot signal is used for the recording mode signal. In the reproducing operation, the aspect ratio of a reproduced picture is recognized from the recording mode signal, and a signal indicative of the aspect ratio is delivered to an external device, such as a television set, together with reproduced video/audio signals. In a case where the reproduced picture is a wide picture and where the external device does not conform to the wide picture, the aspect ratio of the video signal is changed. A television set suited to the features of the video tape recorder is also disclosed.

Claims

1. A video tape recorder for recording and reproducing video signals onto and from a magnetic tape, comprising:

accepting means for selectively accepting, as a video signal to be recorded, a video signal for a first aspect ratio (width-to-height ratio of a screen) and a video signal for a second aspect ratio greater than the first aspect ratio for a wider screen;

aspect ratio discrimination means for determining the aspect ratio of the video signal to be recorded;

means for generating a recording mode signal indicative of a result obtained from said aspect ratio discrimination means;

recording means provided with a plurality of rotary heads for recording the recording mode signal and the video signal to be recorded onto said magnetic tape by the use of said rotary heads; and

supplying means for supplying the recording mode signal and the video signal to be recorded to said recording means such that the recording mode signal is one of

(1) inserted in a vertical retrace interval of the video signal to be recorded in response to a head switching signal for sequentially activating said rotary heads, and

(2) recorded in a recording area on said magnetic tape which differs from a video signal recording area used for recording the video signal to be recorded, wherein the recording mode signal contains a code which represents the aspect ratio of the video signal to be recorded;

wherein said aspect ratio discrimination means is first aspect ratio discrimination means, wherein said recording means sequentially activates said rotary heads in response to a head switching signal, and wherein said supplying means includes;

means for generating a pulse signal indicative of a vertical retrace period of the video signal to be recorded based on the head switching signal; and

means responsive to the pulse signal for multiplexing the recording mode signal with the video signal to be recorded by inserting the recording mode signal in the vertical retrace period of the video signal to be recorded, thereby producing a multiplexed recording mode signal and video signal;

wherein said recording means records the multiplexed recording mode signal and video signal onto said magnetic tape by the use of said rotary heads; and

wherein the recording mode signal further contains a code which represents a type of an input device which is adapted to be used for inputting the video signal to be recorded to the accepting means.

2. A video tape recorder for recording and reproducing video signals onto and from a magnetic tape, comprising:

first accepting means for selectively accepting, as a video signal to be recorded, a video signal for a first aspect ratio (width-to-height ratio of a screen) and a video signal having a second aspect ratio greater than the first aspect ratio for a wider screen;

first aspect ratio discrimination means for determining the aspect ratio of the video signal to be recorded;

second accepting means for selectively accepting, as a still picture signal to be recorded, a still picture signal for the first aspect ratio and a still picture signal for the second aspect ratio;

second aspect ratio discrimination means for determining the aspect ratio of the still picture signal to be recorded;

means for generating a first recording mode signal indicative of a result obtained from the first aspect ratio discrimination means and a result obtained from the second aspect ratio discrimination means;

means for digitizing the still picture signal to be recorded; and

recording means provided with a plurality of rotary heads for recording the video signal to be recorded in a video recording area on the magnetic tape by the use of the rotary heads, recording the digitized still picture signal in a PCM recording area on the magnetic tape by the use of the rotary heads, the PCM recording area being separate from the video recording area, and recording the first recording mode signal in an area on the magnetic tape between the video recording area and the PCM recording area by the use of the rotary heads.

3. A video tape recorder according to claim 2, wherein the first recording mode signal includes information indicative of respective types of input devices from which the video signal to be recorded and the still picture signal to be recorded were obtained.

4. A video tape recorder according to claim 2, further comprising:

means for generating a second recording mode signal indicative of the result obtained from the second aspect ratio discrimination means;

wherein the recording means records the second recording mode signal in the PCM recording area together with the digitized still picture signal by the use of the rotary heads.

5. A video tape recorder according to claim 2, further comprising:

means for reproducing the recorded video signal, the recorded digitized still picture signal, and the recorded first recording mode signal from the magnetic tape by the use of the rotary heads to produce a reproduced video signal, a reproduced digitized still picture signal, and a reproduced first recording mode signal;

third aspect ratio discrimination means for determining the aspect ratio of the reproduced video signal;

fourth aspect ratio discrimination means for determining the aspect ratio of the reproduced digitized still picture signal;

means for supplying the reproduced video signal and the reproduced digitized still picture signal to an external device;

means for receiving from the external device information as to whether the external device is a "wide" device or not; and

first aspect ratio changing means responsive to the information received from the external device and a result obtained from the third aspect ratio discrimination means for changing the aspect ratio of the reproduced video signal supplied to the external device from one of the first aspect ratio and the second aspect ratio indicated by the result obtained from the third aspect ratio discrimination means to the other of the first aspect ratio and the second aspect ratio.

6. A video tape recorder according to claim 5, further comprising second aspect ratio changing means responsive to the information received from the external device and a result obtained from the fourth aspect ratio discrimination means for changing the aspect ratio of the reproduced digitized still picture signal supplied to the external device from one of the first aspect ratio and the second aspect ratio indicated by the result of the fourth aspect ratio discrimination means to the other of the first aspect ratio and the second aspect ratio.