Discontinuous motion special effects generator for television

• US 4,080,626 A
• Filed: 12/23/1976
• Issued: 03/21/1978
• Est. Priority Date: 07/19/1976
• Status: Expired due to Term

• Current Assignee: RCA Corporation
• Original Assignee: RCA Corporation
• Inventors: Hurst, Robert Norman, Huffman, Fred Wayne
• Primary Examiner(s): Griffin, Robert L.
• Assistant Examiner(s): Masinick, Michael A.
• Application Number:
  US05/753,878
• Time in Patent Office: 453 Days
• Field of Search: 358/141, 358/93, 358/160, 358/22, 358/82, 358/135, 358/136, 360/9, 360/10, 360/11, 360/33
• US Class Current: 348/559
• CPC Class Codes: H04N 5/2625 for obtaining an image which is composed of images from a temporal image sequence, e.g. for a stroboscopic effect sequence generated by event triggered capturing H04N7/188

Abstract

A discontinuous motion special effects generator for television is described including a memory means responsive to a television video signal for storing signals representing a television picture field and memory control means for controlling the writing and reading of the picture fields. This generator includes means for automatically providing control pulses at a rate for desired discontinuous motion. The generator further includes means coupled to the memory control means and responsive to the control pulses for writing a single picture field of video only on the occurrence of each control pulse whereby the video output changes only on the occurrence of each control pulse.

Claims

1. A discontinuous motion special effects generator system for television, comprising:

memory means responsive to a television video signal for storing signals representing a television picture field,

memory control means for controlling the writing and reading of the picture fields,

means for automatically providing control pulses at a predetermined rate for purposely providing the special effect of discontinuous motion, and

means coupled to said memory control means and responsive to said control pulses for causing the stored field readout of the memory to change in response to said control pulses.

2. The combination of claim 1 wherein said means for causing the readout of the memory to change in response to said control pulses includes means coupled to said memory control means responsive to said control pulses for writing a single picture field of video only on the occurrence of each control pulse whereby the video output readout of the memory changes only on the occurrence of each control pulse.

3. The combination of claim 1 wherein said means for automatically providing control pulses includes a pulse generator.

4. The combination of claim 3 wherein said pulse generator has a pulse repetition rate on the order of 1 to 2 pulses per second.

5. The combination of claim 1 wherein said means for automatically providing control pulses includes means responsive to audio signals for producing control signals.

6. The combination of claim 5 wherein said means responsive said audio signal includes a low pass filter for passing the low frequency components representing the rhythm of music that may be accompanying the video.

7. The combination of claim 5 including a clipping circuit coupled to the output of said low pass filter.

8. A discontinuous motion special effects generator system for television, comprising:

memory means responsive to a television video signal for storing signals representing a television picture field,

memory control means for controlling the writing and reading of the picture fields, and

means coupled to said memory control means and responsive to audio signals accompanying the television signal for causing the stored field readout of the memory to change with the audio signals.

9. The combination of claim 8 wherein the last mentioned means includes means for changing the stored readout in synchronism with the rhythm of music.

10. The combination of claim 9 wherein the last mentioned means includes a low pass filter.