A transmission system, of the type wherein input data to be transmitted is stored in blocks and less than all stored data is extracted from the blocks for transmission and the extracted data is subjected to interpolation to restore all of the data, includes computing circuits for obtaining respective differences between input data and restored data and between input data and stored data and the sums of such differences, and further computing and comparison circuits operating with such difference...

In a decoding apparatus for decoding data, such as a digital video signal or the like, transmitted with a smaller number of bits than that of the original datum, sample data adjacent a sample datum to be decoded are separated from the transmitted data and compared with the sample datum to be decoded, whereupon a correcting datum is generated on the basis of the compared output. The original datum is recovered from the sample datum to be decoded and the correcting datum, whereby the quantizing er...

In an apparatus for coding digital video data in the form of blocks thereof dynamic range information is generated from maximum and minimum values of the digital video data representing plural picture elements in each block, the minimum value is substracted from each of the digital data to generate modified digital video data, the modified digital video data is encoded with a fixed digitized bit number less than that of the original digital video data, and the encoded data and an additional code...

A high efficiency apparatus for coding digital video data compresses the number of bits per picture element in the video data such as a digital video signal or the like is. The video data of a television picture plane is divided into a number of three-dimensional blocks, i.e., spatial blocks. The picture element data in the block can be coded using a reduced number of bits by bit compression by performing a coding process adapted to the narrowed dynamic range on the basis of the correlation amon...

In a system for displacement vector searching in digital image analysis, sub-totals of the amount differences in gray value for the pixel data of two images are calculated in parallel for more than one pair of pixels. These sub-totals are subsequently added together in an accumulator unit. In a control computer connected to the accumulator unit, the displacement vector is determined by selecting the minimum of a number of such added values.

In a real-time video signal processor for processing an input digital video signal divisible into a succession of principal blocks each of which has at least one scanning line and a time duration shorter than a frame period, each principal block is divided into at least two partial blocks with each scanning line divided into the respective partial blocks. A plurality of signal processing modules are assigned with the respective partial blocks of each principal block, respectively. Responsive to ...

An image information transmission system for transmitting multi-pixel frames of image information, upon transmission, the data corresponding to a frame are divided into blocks each containing a predetermined number of pixel data, and discrimination data are prepared by discriminating whether each block belongs to a moving image area or a still image area of the frame. The data of a block of a moving image area are encoded using only the data of that block and according to a first encoding method...

For the transmission of a digital video signal via a transmission medium (11) consecutive pictures of N.times.M picture elements are subsivided into sub-pictures, a sub-picture being asembled from n.times.m picture elements. The maximum value and the minimum value (U.sub.max, U.sub.min) of a video signal component associated with the picture elements in a sub-picture are determined. In addition, the amplitudes of a video signal component associated with the picture elements in the sub-picture ar...

An image information transmission system that transmits image information, one frame of which is constituted by a plurality of image data. The plurality of pixel data corresponding to the one-frame image information is divided into a plurality of pixel blocks using a predetermined number of pixel data as a unit pixel block. Maximum and minimum values of pixel data within each pixel block are detected in units of divided pixel blocks. Maximum value data representing the detected maximum value and...

Motion vectors are determined in each frame of the input image data, and optimum motion vectors characterizing the motion are extracted from the determined motion vectors, a three-dimensional block is composed in space and in time along the extracted optimum motion vectors, and the composed three-dimensional block is block-coded by orthogonal transform or the like, according to the disclosed picture coding method.