초록 ▼

An image-compression system, wherein the image consists of a planar array of data points having various brightness levels, comprises a transmitter and a receiver. The transmitter comprises an analog-digital converter, for converting input analog data into digital data. The cosine transform is taken

An image-compression system, wherein the image consists of a planar array of data points having various brightness levels, comprises a transmitter and a receiver. The transmitter comprises an analog-digital converter, for converting input analog data into digital data. The cosine transform is taken of the incoming digital data to transform the data representing various brightness levels into the frequency domain. The various frequency data points are differentially pulse code modulated, thereby removing line-to-line redundancy, the output data being in parallel form. Timing circuitry is provided for controlling the timing of the various circuits. Circuitry is provided in a receiver for the modulating or decoding of the output signal of the transmitter.

대표청구항 ▼

A digital image-compression system, comprising a transmitter and a receiver, wherein the image consists of a planar array of data points having various brightness levels, the transmitter comprising: means for converting input analog data into digital data; means, whose input is connected to the outp

A digital image-compression system, comprising a transmitter and a receiver, wherein the image consists of a planar array of data points having various brightness levels, the transmitter comprising: means for converting input analog data into digital data; means, whose input is connected to the output of the analog-to-digital (A/D) converting means, for taking the cosine transform of the incoming digital data, to transform the data representing the various brightness levels into the frequency domain; and means, whose input is connected to the output of the cosine transform means, for differentially pulse code modulating (DPCM) the input data, thereby removing line-to-line redundancy, the output data being in parallel form; and means, connected to each of the three means, for controlling the timing of the three means.