Method and apparatus for transmitting video data

• US 4,788,589 A
• Filed: 11/25/1986
• Issued: 11/29/1988
• Est. Priority Date: 11/30/1985
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kondo, Tetsujiro
• Primary Examiner(s): Britton, Howard W.
• Assistant Examiner(s): Kostak, Victor R.
• Application Number:
  US06/934,804
• Time in Patent Office: 735 Days
• Field of Search: 358/133, 358/135, 358/136, 358/313, 360/11.1
• US Class Current: 375/240.12
• CPC Class Codes: H04N 19/587 involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
• CPC Class Codes: H04N 7/122 involving expansion and subsequent compression of a signal segment, e.g. a frame, a line

Abstract

Disclosed is an apparatus for transmitting video signals comprising an input device for receiving video data of sequential fields a memory for storing the video data of a plurality of fields, parameter generating devices for generating respective parameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of a plurality of fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between the plurality of fields to be periodically transmitted each being stored in memory. Means are provided for transmitting the video data of the fields to be periodically transmitted every predetermined number of fields and the respective parameters instead of the video data of the respective field to be skipped.

Claims

1. An apparatus for transmitting video signals comprising:

input means for receiving video data of sequential fields;

memory means for storing the video data of a plurality of fields;

parameters generating means for generating a predetermined number of respective parameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of a plurality of non-adjacent, alternately odd and even fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between said plurality of fields to be periodically transmitted, each being stored in said memory means; and

means for transmitting the video data of said fields to be periodically transmitted every said predetermined number of fields and said respective parameters instead of the video data of said respective field to be skipped.

2. An apparatus for transmitting video signals according to claim 1, wherein the video data of one of said odd fields are transmitted together with said respective parameters defining a respective odd field to be skipped and the video data of one of said even fields are transmitted together with said respective parameters defining a respective even field to be skipped.

3. An apparatus for transmitting video signals according to claim 1, wherein the video data of at least ten fields are stored in said memory means.

5. An apparatus for transmitting video signals accorrding to claim 1, wherein said parameter generating means consists of an arithmetic operating circuit for obtaining said respective parameters to minimize the square sum of the prediction error between a prediction value and a true value of a respective pixel of said respective field to be skipped.

4. An apparatus for transmitting video signals comprising:

input means for receiving video data of sequential fields;

memory means for storing the video data of a plurality of fields;

parameter generating means for generating respective prameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of a plurality of fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between said plurality of fields to be periodically transmitted, each being stored in said memory means; and

means for transmitting the video data of said fields to be periodically transmitted every said predetermined number of fields and said respective parameters instead of the video data of said respective field to be skipped;

wherein the video data of said plurality of fields are periodically transmitted every five fields.

6. An apparatus for transmitting video signals comprising:

input means for receiving video data of sequential fields;

memory means for storing the video data of a plurality of fields;

parameter generating means for generating respective parameters to specify a time spatial relation which is defined by a linear combination from references pixel data of a plurality of fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between said plurality of fields to be periodically transmitted, each being stored in said memory means; and

means for transmitting the video data of said fields to be periodically transmitted every said predetermined number of fields and said respective parameters instead of the video data of said respective field to be skipped;

wherein said parameter generating means consists of means for extracting neighboring reference pixel data around respective pixels of a field to be skipped, first multiplying means for multiplying a matrix of neighbor reference pixel data and a transposed matrix thereof, first accumulating means for accumulating the result from said means for multiplying over a whole field, means for generating an inverse matrix of the result from said first accumulating means, second multiplying means for multiplying respective pixel data of fields to be transmitted and to be skipped, second accumulating means for accumulating the result from said second multiplying means, and third multiplying means for mutiplying the result from said means for generating the inverse matrix and second multiplying means.

7. Method for transmitting video signals comprising the steps of:

receiving video data of sequential fields;

storing the video data of a plurality of fields;

generating a predetermined number of respective parameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of a plurality of non-adjacent, alternately odd and even fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between said plurality of fields to be periodically transmitted; and

transmitting the video data of said fields to be periodically transmitted every said predetermined number of fields and said respective parameters instead of the video data of said respective field to be skipped.

8. Method for transmitting video signals according to claim 7, wherein said step of transmitting includes the step of transmitting the video data of one of said odd fields together with said respective parameters defining a respective odd field to be skipped and the video data of one of said even fields together with said respective parameters defining a respective even field to be skipped.

9. Method for transmitting video signals accoring to claim 7, wherein said step of storing includes storing the video data of at least ten fields.

10. Method for transmitting video signals according to claim 7, wherein said step of generating includes the step of obtaining said respective parameters to minimize the square sum of the prediction error between a prediction value and a true value of respective pixels of said respective field to be skipped.

11. Method for transmitting video signals comprising the steps of;

receiving video data of sequential fields;

storing the video data of a plurality of fields;

generating respective parameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of a plurality of fields to be periodically transmitted every predetermined number of fields and pixel data of a respective field to be skipped between said plurality of fields to be periodically transmitted; and

transmitting the video data of said fields to be periodically transmitted every said predetermined number of fields and said respective parameters instead of the video data of said respective field to be skipped;

wherein said step of transmitting includes the step of transmitting periodically the video data of said plurality of fields every five fields.

12. An apparatus for decoding video signals comprising:

input means for receiving the video data of fields being periodically transmitted every predetermined number of fields and a predetermined number of respective parameters to specify a time spatial relation which is defined by a linear combination from reference pixel data of non-adjacent, alternately odd and even ones of said fields being periodically transmitted and pixel data of a respective field being skipped between said fields being periodically transmitted;

memory means for storing the data of said received video data of said fields being periodically transmitted; and

prediction means for predicting pixel data of said respective field being skipped from said video data of said received video data of said fields being periodically transmitted and said respective parameters.