Image signal coding system
DCFirst Claim
Patent Images
1. A video signal encoder for encoding a first motion video signal representative of sequential video images including first and second video images into a second motion video signal comprising:
- a predictive error signal generator for generating a predictive error signal representative of the error in the second video image based on a prediction formed at least in part from the first video image;
a coder for transform coding the predictive error signal to produce a coded predictive error signal, said coder varying the scanning sequence of the transform coefficients thereof;
a local decoder detecting the scanning sequence of transform coefficients used in transform coding, and decoding the transform coefficients of the coded predictive error signal to produce information representative of the first motion video signal including the first video image;
a combiner, operatively connected to said local decoder, and combining the predictive error signal with a predictive signal;
an image data memory, operatively connected to said combiner, for storing information representative of the first video image as image data;
a predictive signal generator, operatively connected to said image data memory, and supplying the predictive signal from the image data stored in said image data memory to said predictive error signal generator and said combiner;
wherein a signal representative of the second video image of the first motion video signal is assembled from the predictive error signal developed from a difference between the first video image and the second video image;
wherein the coded predictive error signal from said coder is output as the second motion video signal.
0 Assignments
Litigations
0 Petitions
Accused Products
Abstract
An adaptive blocking coding system selects an effective blocking of an input image signal to be encoded in accordance with the correlation between fields, even if motion is detected between the fields. The blocking patterns include an individual field blocking, a non-interlace blocking, a split blocking and an inverted split blocking. Further, the coding system searches for motion from both odd and even fields of a frame for producing a motion compensated prediction signal in order to provide high-efficient coding.
-
Citations
10 Claims
-
1. A video signal encoder for encoding a first motion video signal representative of sequential video images including first and second video images into a second motion video signal comprising:
-
a predictive error signal generator for generating a predictive error signal representative of the error in the second video image based on a prediction formed at least in part from the first video image; a coder for transform coding the predictive error signal to produce a coded predictive error signal, said coder varying the scanning sequence of the transform coefficients thereof; a local decoder detecting the scanning sequence of transform coefficients used in transform coding, and decoding the transform coefficients of the coded predictive error signal to produce information representative of the first motion video signal including the first video image; a combiner, operatively connected to said local decoder, and combining the predictive error signal with a predictive signal; an image data memory, operatively connected to said combiner, for storing information representative of the first video image as image data; a predictive signal generator, operatively connected to said image data memory, and supplying the predictive signal from the image data stored in said image data memory to said predictive error signal generator and said combiner; wherein a signal representative of the second video image of the first motion video signal is assembled from the predictive error signal developed from a difference between the first video image and the second video image; wherein the coded predictive error signal from said coder is output as the second motion video signal. - View Dependent Claims (2, 3)
-
-
4. A video signal conversion system for converting between a first motion video signal representative of sequential video images including first and second video images and a second motion video signal comprising:
-
a decoder detecting the scanning sequence of transform coefficients used in transform coding, and decoding the transform coefficients to produce information representative of the first and second video images; an image data memory for storing information representative of the first video image as image data; a predictive signal generator, operatively connected to said image data memory, and supplying a predictive signal from the image data stored in said image data memory; wherein a signal representative of the second video image is assembled from a predictive error signal output from said decoder and developed from a difference between the first video image and the second video image; and a combiner, operatively connected to said image data memory, and combining the signal representative of the second video image with the predictive signal produced by said predictive signal generator. - View Dependent Claims (5, 6, 7, 8, 9, 10)
-
Specification