Claims
- 1. A blanking circuit for a video disk player performing special playback by moving a head in the radial direction of a video disk and causing said head to jump over a plurality of tracks, said circuit comprising:
- a demodulating circuit for demodulating a received video signal produced from said video disk;
- control means responsive to a condition signal distinguishing between a constant angular velocity (CAV) disk and a constant linear velocity (CLV) disk for generating an elimination control signal; and
- eliminating means responsive to said elimination control signal for eliminating all image data contained in said demodulated video signal produced by said demodulating circuit.
- 2. A blanking circuit as recited in claim 1, wherein said condition signal further distinguishes between open loop and closed loop tracking of said head.
- 3. A blanking circuit for a video disk player performing special playback by moving a head in the radial direction of a video disk and causing said head to jump over a plurality of tracks, said circuit comprising:
- a demodulating circuit for demodulating a received video signal produced from said video disk;
- control means responsive to a condition signal for generating an elimination control signal; and
- eliminating means responsive to said elimination control signal for eliminating all image data contained in said demodulated video signal produced by said demodulating circuit, wherein said eliminating means comprises a switch, controlled by said control means, connected between a fixed potential and a diode, said diode being connected to a point on an electrical path between an input and an output of said eliminating means.
- 4. A method of blanking an image signal recorded on a video disk, comprising:
- demodulating a video signal containing an image signal;
- determining when signals recorded on adjacent tracks of said video disk are not correlated and when a head tracing said tracks is under open loop control; and
- responsive to said determining step, eliminating said image signal from said demodulated video signal.
- 5. A method as recited in claim 4, wherein said eliminating step further comprises clamping said image signal to a black level.
- 6. A method as recited in claim 4, wherein said adjacent tracks each extend in a generally circumferential direction of said disk and are adjacent one another in a radial direction of said disk.
- 7. A blanking circuit for a video disk player performing special playback by moving a head in the radial direction of a disk and causing said head to jump over a plurality of tracks, said circuit comprising:
- a demodulating circuit for demodulating a received video signal;
- an eliminating means for preventing said video signal produced by said demodulating circuit from being outputted; and
- control means for controlling said eliminating means, said control means inhibiting said eliminating means when synchronizing signals in video format signals on adjacent tracks of said video disk are correlated.
- 8. A blanking circuit as recited in claim 7, wherein said adjacent tracks each extend in a generally circumferential direction of said disk and are adjacent one another in a radial direction of said disk.
- 9. A blanking circuit for a video disk player performing special playback by moving a head in the radial direction of a video disk and causing said head to jump over a plurality of tracks, said circuit comprising:
- a demodulating circuit for demodulating a received video signal produced from said video disk;
- an eliminating circuit for preventing said video signal produced by said demodulating circuit from being outputted; and
- control means receiving an indicating signal indicating whether said disk is a constant linear velocity (CLV) or constant angular velocity (CAV) disk and responsive to said indicating signal for controlling said eliminating circuit, said control means inhibiting said eliminating circuit when said indicating signal indicates that said video disk is a constant angular velocity disk.
Priority Claims (1)
Number |
Date |
Country |
Kind |
60-92036[U] |
Jun 1985 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 07/236,265, filed Aug. 24, 1988, which is a continuation of application Ser. No. 875,811 filed Jun. 18, 1986, both now abandoned.
US Referenced Citations (17)
Non-Patent Literature Citations (2)
Entry |
Service Manual for "Laser Disc Player VP-1000", pp. 34,35 and 37, published by Pioneer Electronic Corporation, May 1980. |
Technical Information LD-700, LD-v4000, Pioneer Electronic Corp., Jan. 1985. |
Continuations (2)
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Number |
Date |
Country |
Parent |
236265 |
Aug 1988 |
|
Parent |
875811 |
Jun 1986 |
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