Lower resolution HDTV receivers
First Claim
1. Apparatus for decompressing compressed video data occurring in blocks representing respective image areas of successive frames with a first spatial resolution, and wherein each frame consists of a plurality of distinct image areas, said apparatus including memory means for storing decompressed video data, means for decompressing respective blocks of data to produce decompressed video signal representing corresponding image areas with a second spatial resolution lower than said first spatial resolution, and means for storing said decompressed video signal in said memory means.
1 Assignment
0 Petitions
Accused Products
Abstract
A receiver for receiving block coded HDTV compressed digital video signals decimates the data in each block to produce NTSC resolution images but with a significant savings in receiver hardware.
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Citations
20 Claims
- 1. Apparatus for decompressing compressed video data occurring in blocks representing respective image areas of successive frames with a first spatial resolution, and wherein each frame consists of a plurality of distinct image areas, said apparatus including memory means for storing decompressed video data, means for decompressing respective blocks of data to produce decompressed video signal representing corresponding image areas with a second spatial resolution lower than said first spatial resolution, and means for storing said decompressed video signal in said memory means.
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14. Apparatus for decompressing compressed video data occurring in blocks representing respective image areas of successive frames with a first spatial resolution to produce decompressed video signal representing corresponding image areas with a second spatial resolution lower than said first spatial resolution, said block of video data including M×
- N matrices of transform coefficients representing M×
N matrices of pixel values, and including motion vectors having a spatial resolution at least equal to the first spatial resolution of said pixels, said apparatus comprising;a source of blocks of M×
N matrices of transform coefficients;means including inverse transform means responsive to said blocks of M×
N transform coefficients for generating corresponding S×
R matrices of values (M, N, S and R are integers with M×
N>
S×
R);means including a motion compensated predictor responsive to said R×
R matrices of values and said motion vectors for generating S×
R matrices of pixel values representing respective image areas with said second spatial resolution, said motion compensated predictor including means for substantially conforming spatial resolutions of the motion vectors and the S×
R matrices of values; andmemory means for storing respective S×
R matrices of pixel data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- N matrices of transform coefficients representing M×
Specification