Abstract: A prediction error generating unit generates a predictive vector from the motion vectors of a plurality of adjacent blocks, and obtains a difference from a target vector. A plurality of variable-length coding units respectively encode the output of the prediction error generating unit with different encoding methods. A determining unit estimates the accuracy of the predictive vector generated by the prediction error generating unit based on the degrees an of non-uniformity of the motion vectors of the plurality of adjacent blocks. A selecting unit selects one of the encoding results obtained by the plurality of variable-length coding units.

Abstract: A prediction error generating unit generates a predictive vector from the motion vectors of a plurality of adjacent blocks, and obtains a difference from a target vector. A plurality of variable-length coding units respectively encode the output of the prediction error generating unit with different encoding methods. A determining unit estimates the accuracy of the predictive vector generated by the prediction error generating unit based on the degrees of non-uniformity of the motion vectors of the plurality of adjacent blocks. A selecting unit selects one of the encoding results obtained by the plurality of variable-length coding units.

Abstract: A prediction error generating unit generates a predictive vector from the motion vectors of a plurality of adjacent blocks, and obtains a difference from a target vector. A plurality of variable-length coding units respectively encode the output of the prediction error generating unit with different encoding methods. A determining unit estimates the accuracy of the predictive vector generated by the prediction error generating unit based on the degrees of non-uniformity of the motion vectors of the plurality of adjacent blocks. A selecting unit selects one of the encoding results obtained by the plurality of variable-length coding units.

Abstract: A prediction error generating unit generates a predictive vector from the motion vectors of a plurality of adjacent blocks, and obtains a difference from a target vector. A plurality of variable-length coding units respectively encode the output of the prediction error generating unit with different encoding methods. A determining unit estimates the accuracy of the predictive vector generated by the prediction error generating unit based on the degrees of non-uniformity of the motion vectors of the plurality of adjacent blocks. A selecting unit selects one of the encoding results obtained by the plurality of variable-length coding units.

Abstract: A high-definition magnified image is obtained by simple computation. A magnified image is obtained by obtaining a deteriorated image on the basis of an input original image, determining enhancement filters used for individual small areas of the original image using the deteriorated image at least, performing a filtering process by applying the filters thus determined to the individual small areas to achieve enhancement, and interpolating the image for magnification.

Abstract: A selection unit selects ‘0’ for the first through the (N?1)th frames, and selects a predicted image for the subsequent frames. Thus, an intra-frame coding process is performed on the first through the (N?1)th frames, and an adaptive coding process is performed on the subsequent frames. An information amount reduction unit reduces the amount of information about data in the first through the (N?1)th frames. An information amount adjustment unit stepwise increases the amount of information reduced by the information amount reduction unit.

Abstract: The present invention discloses a dynamic image encoding apparatus and a method for encoding a dynamic image in which the dynamic image is divided into data blocks, the data blocks are encoded, and then block division information including a size of a picture or a size of the encoded data blocks is inserted at a position after a synchronous code in a header of each group including a plurality of the encoded data blocks when the groups are transmitted.

Abstract: A prediction error generating unit generates a predictive vector from the motion vectors of a plurality of adjacent blocks, and obtains a difference from a target vector. A plurality of variable-length coding units respectively encode the output of the prediction error generating unit with different encoding methods. A determining unit estimates the accuracy of the predictive vector generated by the prediction error generating unit based on the degrees of non-uniformity of the motion vectors of the plurality of adjacent blocks. A selecting unit selects one of the encoding results obtained by the plurality of variable-length coding units.

Abstract: A Viterbi decoder for decoding a receive signal series encoded by an error correcting code is disclosed. The Viterbi decoder comprises a storage unit for storing a plurality of branch metrics, and a control unit for performing, upon receipt of the receive signal series, the processing of selecting a surviving path for each status using the branch metrics stored in the storage unit. The memory is prepared in accordance with the pattern of the receive signal series for storing a plurality of tables holding the branch metrics corresponding to each status. Each table holds the branch metrics in such a manner that the branch metrics of the two branches entering each status may be read by the control unit in the order of the branches constituting a trellis.