Video sequencer-processor

• US 4,198,656 A
• Filed: 10/24/1975
• Issued: 04/15/1980
• Est. Priority Date: 10/24/1975
• Status: Expired due to Term

• Current Assignee: Pelco Sales, Inc.
• Original Assignee: Pelco Sales, Inc.
• Inventors: Mathisen, William D.
• Primary Examiner(s): Konick, Bernard
• Assistant Examiner(s): Faber, Alan
• Application Number:
  US05/625,598
• Time in Patent Office: 1,635 Days
• Field of Search: 178/DIG. 22, 178/DIG. 1, 178/DIG. 38, 178/6.6 R, 178/6.6 DD, 178/6.6 A, 360/10, 360/11, 360/35, 360/19, 360/49, 360/18, 360/24, 360/33, 360/72, 360/61, 360/37, 358/127, 358/128, 358/108, 358/903, 358/147
• US Class Current: 348/159
• CPC Class Codes: G08B 13/19634 Electrical details of the system, e.g. component blocks for carrying out specific functions
• CPC Class Codes: G08B 13/19645 Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/002 Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing; transfer of record carriers from magazine G11B15/68, G11B17/10; G11B17/22
• CPC Class Codes: G11B 27/026 on discs G11B27/028, G11B27/029 take precedence
• CPC Class Codes: G11B 27/028 with computer assistance
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: H04N 5/91 Television signal processing therefor

Abstract

Apparatus for selecting a particular signal group from a signal group sequence including a video recorder for sequentially recording the video signals from a plurality of surveillance television cameras, the signal group sequence comprising a sequential record of video fields interspaced in a predetermined order, together with a sequence code. During playback, a particular frame or field in the sequence is picked out according to the code associated therewith and is fed in parallel both to a video display and a disc storage device. At the completion of the selected frame the disc is unloaded into the display at its cycling rate to fill in the gap left by the discarded frames until the next frame sequence is initiated.

Claims

1. A system for commutating and decommutating a frame by frame sequence of a plurality of surveillance television cameras, comprising:

sequencing means connected to said television cameras for sequentially selecting ones thereof for recording;

coding means connected to said sequencing means for developing serial code groups in corresponding relationship with the selection of said cameras, said serial code groups each having an individual code combination for each said camera;

superimposition means connected to said sequencing and coding means for interposing the individual code combination for each camera within the vertical interval of each field received from said cameras;

recording means connected to said superimposition means to serially record the signals in said fields from said cameras with said combinations interposed therein in a single recording channel, said recording means including a recorder that controls the rate of recording said signals and also is connected to said sequencing means to advance sequential selection of said cameras at the same rate, thereby achieving recordation of said signals for time lapse video signal storage;

playback means selectively connected to said recording means for selecting individual ones of said camera output signals according to a predetermined one of said individual code combinations that are interposed in the vertical intervals of fields stored in said recording means;

video display means connected to said playback means for producing a visual image corresponding to said selected camera signals; and

storage means connected to said playback and display means for storing said selected camera signal and cyclically repeating said signal to said display means.

2. The system of claim 1 wherein said coding means further comprises:

a code convertor for establishing unique binary code bit combinations in association with each of said cameras;

shift register means for serializing code bit combinations;

an interval generating one-shot multi-vibrator which establishes time intervals between code bits during recording and which sets a pulse width limit for bit value detection during playback; and

a bit value one-shot multi-vibrator which generates pulses during recording of widths determined by said serialized bit values of said code group.

3. The system of claim 2 wherein said playback means further comprises:

clipping means for inhibiting the transmission of said recorded camera field signals from said recording means to said video display means;

a pulse width discriminating circuit connected to said recording means to receive said code bit combinations interposed in said fields and operative to detect each code associated with each field;

a comparator operatively connected to said discriminating circuit;

means for connecting a predetermined code to said comparator; and

gating means enable by said comparator when a code bit combination matches said predetermined code to disable said clipping means.

4. Apparatus according to claim 1 wherein said camera output signals include a line by line video scan signal arranged in a two field per frame format with a horizontal sync signal occurring at the beginning of each line and a vertical sync signal occuring at the beginning of each field, and wherein:

said coding means further includes logic means responsive to said vertical and horizontal sync signals for generating and detecting said serial code groups.

5. Apparatus according to claim 1 wherein said sequencing means includes signal generating means for generating an exclusive one of a plurality of switch drive signals and for driving said coding means;

and

said coding means includes a code convertor connected to said signal generating means for converting the signal therefrom into a binary code group.

6. Apparatus according to claim 1 wherein:

said storage means comprises a disc storage device and includes a rotating storage medium and a read-write head adapted to selectively record and retrieve said camera signals on said medium, and said playback means further comprises;

discriminating circuitry connected to said recording means to receive code bit combinations therefrom;

a comparator operatively connected to said discriminator circuitry;

means for connecting a predetermined code to said comparator;

gating means for actuating said disc storage device to update the contents of said storage medium in response to a signal from said comparator when a code bit combination matches said predetermined code.

7. A system for recording and playing back field signals from a plurality of surveillance television cameras comprising:

sequencing means connected to said television cameras for sequencially selecting ones thereof for recording;

coding means connected to said sequencing means for developing serial code groups in corresponding relationship with the selection of said cameras, said serial code groups each having an individual code combination for each said camera;

superimposition means connected to said sequencing and coding means for interposing the individual code combination for each camera within the vertical interval of each field;

recording means connected to said superimposition means to sequentially record the signals in said fields from said cameras with said codes interposed therein in a single recording channel, said recording means including a recorder that controls the recording rate of said signals and also is connected to said sequencing means to advance sequential selection of said cameras at the same rate, thereby achieving recordation of said signals for time lapse video signal storage;

playback means selectively connected to said recording means for selecting individual ones of said camera output signals according to a predetermined one of said individual code combinations that are interposed in the vertical intervals of fields stored in said recording means; and

video display means connected to said playback means for producing a visual image corresponding to said selected camera signal.

8. Apparatus according to claim 7 further comprising:

storage means connected to said playback and display means for storing said selected camera signal and cyclically repeating said signal to said display means,

wherein an anticipatory circuit generates an update command to said storage means during playback, said command being generated prior to the beginning of the selected camera output signal.