System for controlling a variable source by the feedback of the

Details System for controlling a variable source by the feedback of the System for controlling a variable source by the feedback of the

1992-12-11

1999-01-19

Dung, Dinh C.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345501, 348405, H04N 712, H04N 726

Patent

active

058624104

ABSTRACT:
A system for controlling the rate of flow of data generated by a variable rate data source and fed to a buffer which outputs the data at a constant bit rate. The operating mode, which sets the bit rate of the variable rate data source, is determined not only by the degree to which the buffer is filled, but also by the immediately preceding operating mode. The feedback of the operating mode results in an hysteresis effect on the mode, thus reducing the number of changes of the rate of data generation and thereby increasing the transmission quality of the data generated and output from the system.

REFERENCES:
patent: 4454546 (1984-06-01), Mori
patent: 4633312 (1986-12-01), Yasuda
patent: 4672441 (1987-06-01), Hoelzlwimmer et al.
patent: 4985766 (1991-01-01), Morrison et al.
patent: 5028999 (1991-07-01), Vogel
Sayood et al., "Use of ARMA Predictors in the Differential Encoding of Images", IEEE Transactions on Acoustics, Speech & Signal Processing, 1988 pp. 1791-1795.
Zehne et al., "Video Chip Set for Data Rate Compression by Filtering & DPCM Coding", ISCAS, 1988 pp. 697-700.
Lu et al. "Adaptively Controlled Encoding for Interframe DPCM", IEEE 1988 pp. 38.4.1-38.4.5.

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