Arrangement of encoding motion image signals using motion compensation and orthogonal transformation

• US 5,295,201 A
• Filed: 01/21/1993
• Issued: 03/15/1994
• Est. Priority Date: 01/21/1992
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Yokohama, Yutaka
• Primary Examiner(s): Mancuso, Joseph
• Application Number:
  US08/006,406
• Time in Patent Office: 418 Days
• Field of Search: 382/48, 382/1, 382/41, 382/21, 382/22, 358/105, 358/133, 358/136, 358/103, 358/108
• US Class Current: 382/236
• CPC Class Codes: H04N 19/20 using video object coding
• CPC Class Codes: H04N 19/537 Motion estimation other than block-based
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 19/61 in combination with predictive coding

Abstract

A plurality of frame image signals are successively applied to an image signal encoder. A motion region of an incoming frame image signal is extracted and then approximated in shape to a polygon. The vertices of the polygon are determined and then the coordinate values of the vertices are calculated and transmitted. Further, in the event that the incoming image signal includes a region which is required to undergo orthogonal transformation, the region are extracted and then divided into a plurality of small regions. Following, each of the divided small regions is approximated in shape to a polygon and then the vertices thereof are detected. Subsequently, the coordinate values of the vertices are calculated and then transmitted. Consequently, the data to be transmitted can effectively be reduced.

Claims

1. An arrangement of encoding a plurality of image signals successively applied thereto, said arrangement comprising:

first means for storing a first image signal;

second means which is coupled to said first means and extracts a motion region included in a second image signal by comparing said first and second image signals, said second image signal having been applied to said arrangement immediately after said first image signal;

third means which is coupled to said second means and approximates in shape said motion region to a first polygon and extracting vertices of said first polygon and calculating coordinate values of said vertices, said third means generator first information indicative of said coordinates values from said arrangement;

fourth means which is arranged to receive said first and second image signals and a signal indicative of said first polygon, said fourth means generating motion parameters and a predicted image signal, said motion parameters being derived from said arrangement;

fifth means which is arranged to compare said predicted image signal and said second image signal, said fifth means extracting, from said second signal, a first region which is required to be orthogonally transformed;

sixth means which is arranged to receive said first region and said second image signal, said sixth means dividing said first region into a plurality of second regions;

seventh means, coupled to said sixth means, for approximating in shape each of said second regions to second polygons and extracting vertices of each of said second polygons and calculating coordinate values of said vertices of each of said second polygons, said seventh means generating second information indicating said coordinate values of said vertices of each of said second polygons, said second information being derived from said arrangement.

2. An arrangement as claimed in claim 1, wherein said third means includes:

a polygon generator which is coupled to said second means and approximates in shape said motion region to said first polygon; and

a polygon vertex and extractor which is coupled to said polygon generator and calculates said vertices of said first polygon, said polygon vertex extractor generating said first information.

3. An arrangement as claimed in claim 1, wherein said seventh means includes:

a polygon generator which is coupled to said fifth means and approximates in shape each of said second regions to be second polygon, said polygon generator generating third information indicative of said second polygon;

a polygon vertex extractor which is coupled to said polygon generator and calculates said vertices of each of said second polygons, said polygon vertex extractor generating said second information.

4. An arrangement as claimed in claim 3, further comprising:

eighth means which is arranged to receive said second image signal and said third information, said eighth means generating an orthogonally transforming parameters from said arrangement.