Method of simultaneous multiplex recording of picture and data and of regenerating such record and apparatus therefor

• US 3,900,887 A
• Filed: 01/18/1973
• Issued: 08/19/1975
• Est. Priority Date: 01/18/1973
• Status: Expired due to Term

• Current Assignee: Hamamatsu Photonics KK
• Original Assignee: Hiromu Soga, Katsuhiro Minamida, Kazuo Kurasawa, Masatake II
• Inventors: Minamida, Katsuhiro, Kurasawa, Kazuo, Soga, Hiromu, Ii, Masatake
• Primary Examiner(s): Cardillo, Jr., Raymond F.
• Application Number:
  US05/324,789
• Time in Patent Office: 943 Days
• Field of Search: 178/6.6A,DIG.23,5.6,5.8R 179/2TV 340/174.1 360/18,19,32,33,51
• US Class Current: 360/18
• CPC Class Codes: H04N 5/9203 using time division multiplex
• CPC Class Codes: H04N 5/9206 the additional signal being a character code signal
• CPC Class Codes: H04N 5/926 by pulse code modulation H04N5/919 takes precedence
• 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 7/085 the inserted signal being digital

Abstract

A method of simultaneous multiplex recording and regenerating of pictures and multichannel data, which comprises recording multichannel analog data or digital data, together with pictures on a video tape recorder by sequentially converting the data into digital signals by a multiplexer and an A/D converter and by placing said digital signals, in the form of pulses having a digital value of '"'"''"'"''"'"''"'"'0'"'"''"'"''"'"''"'"' or '"'"''"'"''"'"''"'"'1'"'"''"'"''"'"''"'"', combined with horizontal synchronizing signals of video signals issued from a television camera, into a slightly cleared space right after the horizontal synchronizing signals of the video signals; detecting said data pulses recorded right after the horizontal synchronizing signals from the video tape to regenerate said pulses into digital signals constituting the predetermined bit at the directive of a shift register operated by said horizontal synchronizing signals, and regenerating the data as analog or digital outputs from the digital signals. An apparatus therefor is disclosed.

Claims

1. A method of simultaneous multiplex recording of picture and multichannel data, which comprises:

converting multichannel data serially into digital signals by a multiplexer and an analog to digital converter;

synchronizing digital signals converted by said analog to digital converter with horizontal synchronizing signals separated from video signals issued from a television camera; and

inserting said digital signals as pulses corresponding to the digital value '"'"''"'"''"'"''"'"'0'"'"''"'"''"'"''"'"' or '"'"''"'"''"'"''"'"'1'"'"''"'"''"'"''"'"', so as to have digital signals appear when the synchronized digital signals synchronize with said horizontal synchronizing signals delayed by a certain length of time, into a blanked space right after said horizontal synchronizing pulses of said video signals, thereby recording multichannel data together with a picture on a video tape recorder.

2. A method of simultaneous multiplex regenerating a picture and multichannel data, for reproducing data recorded by the method of claim 1 which comprises detecting pulses of multichannel data recorded right after horizontal synchronizing signals separated from video signals developed by a television camera, from a video tape having recorded thereon such data in the form of series digital signals as pulses;

regenerating said pulses into digital signals constituting predetermined bits at the directive of a shift register activated by said horizontal synchronizing signals; and

regenerating said data from said digital signals.

3. A method of simultaneous multiplex recording of picture and multichannel data, which comprises converting only data for predetermined channels into digital signals skipping over the channels not selected, synchronizing digital signals converted by said analog-to-digital converter with horizontal synchronizing signals separated from video signals issued from a television camera;

and inserting said digital signals as pulses having a value '"'"''"'"''"'"''"'"'0'"'"''"'"''"'"''"'"' or '"'"''"'"''"'"''"'"'1'"'"''"'"''"'"''"'"', so as to have digital signals appear when the synchronized digital signals synchronize with said horizontal synchronizing signals delayed by a certain length of time, into a blanked space right after said horizontal synchronizing pulses;

recording data in series according to channels while generating channel pulses to indicate the channels for recording such data and a channel command pulse to indicate the position of recording said channel pulses into an appropriate video period of the vertical blanking period of the video signals, and skipping over the channels not preselected; and

inserting group bit pulses, after each cycle of the channels, into an appropriate part of the horizontal blanking period, somewhat delayed from data bit pulses, thereby recording multichannel data, combined with a picture, on a video tape recorder at a high sampling speed in recording data.

4. An apparatus for simultaneous multiplex recording and regeneration of pictures and data, such recording being made of analog and digital data in sets corresponding in number to the number of data input channels and in combination with video signals including horizontal synchronizing signals and vertical synchronizing signals, which comprises:

a multiplexer means for generating the data sets sequentially in the order of the channels corresponding thereto;

an analog to digital converter coupled to said multiplexer for converting the analog signals from said multiplexer into digital signals;

a television camera for detecting video signals simultaneously with the detection of said data;

blanking means operatively coupled to said camera for blanking the video signals from said television camera for a certain period following said horizontal synchronizing signals;

a mixer means operatively coupled for inserting the data signals in digital form into the space of the video signals blanked by said blanking means; and

a recorder operatively coupled to said mixer for recording the composite signals made at the mixer from the video signals and the data signals.

5. The apparatus claimed in claim 4, further comprising means coupled to said recorder for detecting pulses of the data signals from said recorder, means coupled to said detecting means for regenerating pulses of the detected data signals into digital signals and means coupled to said regenerating means for transmitting the signals from said regenerating means in the form of at least one of analog and digital signals.

6. An apparatus for simultaneous multiplex recording and regeneration of pictures and data, such recording being made of analog and digital data in sets corresponding in number to the number of data input channels, in combination with video signals including horizontal synchronizing signals and vertical synchronizing signals, which comprises:

a multiplexer means for transferring the sets of data in the order of the channels numbers corresponding thereto;

channel selecting means coupled to said multiplexer for opening the gates of said multiplexer for transmitting data therefrom in the order of channels while skipping the gates for such channels as contain no data;

an analog to digital converter coupled to said multiplexer for converting the analog signals from said multiplexer into digital signals;

a television camera for detecting video signals simultaneously with the detection of the data;

a digital multiplexer means coupled to said analog to digital converter for reading out the data signals from said analog to digital converter;

a counter means operatively coupled for counting said horizontal synchronizing signals, issuing a reading-out signal responsive to each said horizontal synchronizing signal to said digital multiplexer and issuing also thereto a word bit pulse to indicate the completion of reading-out of data from one channel after having counted a certain number of horizontal synchronizing signals;

blanking means coupled to said television camera for blanking the video signals from sAid television camera for a certain period after the horizontal synchronizing signals;

a mixer means coupled to said digital multiplexer for inserting the data signals from said digital multiplexer into the horizontal blanking space after a part of the video signals has been blanked out; and

a recorder coupled to said mixer for recording the signals from said mixer as a combination of video signals and data signals.

7. The apparatus as recited in claim 6, further comprising means for generating horizontal synchronizing signals and vertical synchronizing signals and means operatively coupled for detecting the presence of horizontal synchronizing signals and vertical synchronizing signals in the video signals and automatically adding such signals to the video signals without the use of synchronizing signals.

8. The apparatus as recited in claim 6, further comprising means coupled to said channel selecting means, said means for generating horizontal synchronizing signals and vertical synchronizing signals and said mixer means for generating channel pulses indicating the channels in use under instruction by the signals from said channel selecting means and by the vertical synchronizing signals and transferring said pulses to said mixer means, means coupled to said synchronizing signal means, said mixer means and said channel selecting means for generating channel command pulses indicating the recording positions of said channel pulses under instruction by the vertical synchronizing signals and transmitting said pulses to said mixer means, and means coupled to said channel pulse means and said signal synchronizing means for generating group bit pulses indicating the completion of one cycle under instruction by the channel pulses and the horizontal synchronizing signals.

9. The apparatus claimed in claim 8, further comprising means operatively coupled for synchronously separating horizontal synchronizing signals and vertical synchronizing signals from the signals from said recorder, an abstracter operatively coupled for abstracting said data bit pulses, word bit pulses and group bit pulses from the signal from said recorder under instruction by the horizontal synchronizing signals, a shift register coupled to said synchronizing signal means and shifted by one bit by each horizontal synchronizing signal, means coupled to said abstractor and said shift register for regenerating the original data under instruction by the signals from said abstracter and also by the signals from said shift register, an analog to digital converter coupled to said regenerating means for converting the digital signals from said regenerating means into analog signals, a first detector operatively coupled for detecting the channel command pulses in the signals from said recorder under instruction by the vertical synchronizing signals, a second detector operatively coupled for detecting channel pulses in the signals from said recorder under instruction by the channel command pulses, a channel memory operatively coupled for detecting and memorizing the channels in use under instruction by the signals from said channel command pulse detecting means and also from said channel pulse detecting means, a channel select shift register coupled to said abstractor and shifted under instruction by the group bit pulses from said abstracter, a sample hold and gate operatively coupled to open and shut under instruction by the signals from the channel memory and also from the channel select shift register, and a sample hold circuit operatively coupled for transmitting the data signals from said analog to digital converter automatically according to the channels under instruction by the signals from said sample hold and gate.

10. The apparatus claimed in claim 9, further comprising, means operatively coupled for generating parity bit pulses at the same position as the data signals under instruction by the signals from said digital multiplexer means upon the completion of the construction of data bits in said Digital multiplexer means and means operatively coupled for transmitting signals for detecting parity bit pulses under instruction by the signals from said data bit pulse abstracter and for transmitting to the sample hold and gates, signals for controlling the opening and shutting thereof.