Inverse discrete cosine transformer

Details Inverse discrete cosine transformer Inverse discrete cosine transformer

1994-07-18

1996-05-21

Envall, Jr., Roy N.

Boots, shoes, and leggings

G06F 1714

Patent

active

055196489

ABSTRACT:
The present invention provides an IDCT apparatus for performing an IDCT operation on an input signal having a plurality of macroblocks of transformed coefficients and time gaps of variable duration, each of the time gaps being inserted between two successive macroblocks. The IDCT apparatus comprises an IDCT controller for generating a plurality of control signals, two IDCT processors for alternately converting the macroblocks of coefficients in the data signal into macroblocks of inverse transformed coefficients in response to the control signals. The outputs from the two IDCT processors are combined to the final inverse transformed output data signal from the IDCT apparatus.

REFERENCES:
patent: 5202847 (1993-04-01), Bolton et al.
patent: 5345408 (1994-09-01), Hoogenboom
patent: 5349549 (1994-09-01), Tsutsui
patent: 5387982 (1995-02-01), Kitauva et al.
Yanbin Yu et al., "Interlaced Video Coding with Field-based Multiresolution Representation", Signal Processing: Image Communication, vol. 5, pp. 185-198, Feb. 1993.
Arnould E. et al., "Real Time Discrete Cosine Transform-An Original Architecture", ICASSP 84. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, vol. 3, pp. 46.6/1-4, Mar. 1984.

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