Method and apparatus for improved video display of progressively refreshed coded video

A method for improving the display of progressively refreshed decoded compressed image representative data, said image representative data being representative of a video frame divided into a plurality of subframes, wherein successive video frames include a plurality of subframes having intracoded video signals or a plurality of subframes having intracoded video signals and subframes having intercoded video signals based on predictions from intracoded video signals, said method comprising the steps of:

• identifying subframes of video signals which are decoded from image representative data having intracoded video signals or intercoded video signals based on predictions from intracoded video signals:
• storing in at least one memory array data indications for respective subframes identified as having decoded intracoded video signals or decoded intercoded video signals based on predictions from decoded intracoded video signals;
• and
• displaying substitute video signals, in response to said data indications stored in said memory array, for subframes not identified as having decoded intracoded video signals or decoded intercoded video signals based on predictions from decoded intracoded video signals.

A video decoder for decompressing and controlling the display of progressively refreshed MPEG image representative data, said image representative data being representative of a video frame divided into a plurality of subframes, wherein successive video frames include a plurality of subframes having intracoded video signals or a plurality of subframes having intracoded video signals and subframes having intercoded video signals based on predictions from intracoded video signals, said video decoder comprising:

• decompression means for decompressing MPEG compressed image representative data;
• processor means for generating indicia of subframes of video signals which are decoded from image representative data having intracoded video signals or intercoded video signals based on predictions from intracoded video signals;
• memory means for storing said indicia of respective subframes identified as having intracoded video signals or intercoded video signals based on predictions from intracoded video signals;
• and
• controller means responsive to said indicia stored in said memory means for displaying video signals based on said subframes identified as having intracoded video signals or intercoded video signals based on predictions from intracoded video signals.

A method for improving the display of progressively refreshed decoded compressed image representative data, said image representative data being representative of a video frame divided into a plurality of subframes, wherein successive video frames include a plurality of subframes having video signals based on spatial compression of said video signals without reference to video signals in other video frames, plurality of subframes having said spatially compressed video signals and subframes having temporal compressed video signals based on video signals in more than one video frame and on predictions from said spatially compressed video signals, said method comprising the steps of:

• generating indicia of subframes of video signals which are decoded from image representative data having spatially compressed video signals or temporally compressed video signals based on predictions from said spatially compressed video signals;
• storing in at least one memory array data said indicia of respective subframes identified as having decoded spatially compressed video signals or decoded temporally compressed video signals based on predictions from said decoded spatially compressed video signals;
• displaying video signals, in response to said data indications stored in said memory array, for subframes identified as having decoded spatially compressed video signals or decoded temporally compressed video signals based on predictions from said decoded spatially compressed video signals;
• and
• displaying substitute video signals for subframes not identified as having decoded spatially compressed video signals or decoded temporally compressed video signals based on predictions from said decoded spatially compressed video signals.