Image signal coding system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHirofumi Nishikawa, Yoshihisa Yamada, Tokumichi Murakami, Kohtaro Asai
Life of this patent
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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.
Claims5
A predictor for a system for communicating digital video signals, the predictor producing an output predictive signal for combination with an input signal to produce a video output signal comprising:
- a video memory for storing a previously input video signal as field signals obtained by dividing a frame of said previously input signal into a plurality of fields;
- means for outputting a plurality of predictive signals which predict a change of the input video signal based on the signals stored in said video memory;
- and
- means for interpolating between at least two of the plurality of predictive signals and for providing an interpolated predictive signal which is different from other predictive signals, said interpolated predictive signal being supplied by said predictor as the output predictive signal to facilitate interpolative prediction.
Dependencies are inferred from the claim text.