Apparatus for encoding signals using a configurable transform ci

Details Apparatus for encoding signals using a configurable transform ci Apparatus for encoding signals using a configurable transform ci

1994-10-07

1995-06-20

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

H04N 732

Patent

active

054264626

ABSTRACT:
A signal is encoded by (1) generating a difference signal using a current input signal and a current reference signal, (2) transforming the difference signal to a transform domain, (3) quantizing the transformed signal, and (4) further encoding the quantized signal. The encoded signal is then transmitted, either for storage or for decoding by a remote decoding system. The quantized signal (i.e., without any further encoding) is also dequantized and the resulting dequantized signal is transformed back (i.e., inverse transformed) to the original signal domain as a reference difference signal. The reference difference signal is then added to the current reference signal to generate a next reference signal. The next reference signal may then be used to encode a next input signal. A single transform circuit implements both the forward transform and the inverse transform during encoding by configuring the circuit differently for the forward and inverse transforms.

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