A Video-Rate CCD Two-Dimensional Cosine Transform Processor

A. M. Chiang

doi:10.1117/12.976477

13 October 1987 A Video-Rate CCD Two-Dimensional Cosine Transform Processor

A. M. Chiang

Proceedings Volume 0845, Visual Communications and Image Processing II; (1987) https://doi.org/10.1117/12.976477
Event: Cambridge Symposium on Optics in Medicine and Visual Image Processing, 1987, San Diego, CA, United States

Abstract

The need for transmitting an image through a low data rate channel has led to the development of various image data compression techniques. Recently, transform image coding based on the discrete cosine transform (DCT) algorithm has been proven to be a near optimum method for good quality, low data rate image transmission [1],[2]. In this paper, a CCD two-dimension DCT [3] device structure based on the recently developed one dimension CCD DCT device [4] will be reviewed. The CCD DCT device computes a 16-point cosine transform in 100 ns. The device structure is based on the vector-matrix product algorithm and implemented by using a bank of 256 fixed-weight multipliers. 60-dB dynamic range, -40-dB harmonic distortion has been achieved by the DCT device. Clocked at 10 MHz, the device is performing 5 billion computations per second and dissipates only 700 mW. The speed, power, weight and through-put rate advantages offered by the CCD technology make it ideal to be used in a low cost image transform CODECL [2].

Citation Download Citation

A. M. Chiang "A Video-Rate CCD Two-Dimensional Cosine Transform Processor", Proc. SPIE 0845, Visual Communications and Image Processing II, (13 October 1987); https://doi.org/10.1117/12.976477

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