US PATENT SUBCLASS 348 / 409
.~.~ Involving difference transmission (e.g., predictive)

Current as of: June, 1999
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384  DF  BANDWIDTH REDUCTION SYSTEM {7}
390  DF  .~ Bit-rate reduction {11}
409.~.~ Involving difference transmission (e.g., predictive) {5}
410  DF  .~.~.~> Involving both PCM and DPCM encoding
411  DF  .~.~.~> Plural predictors {2}
415  DF  .~.~.~> Including temporal prediction (e.g., frame difference) {2}
418  DF  .~.~.~> Involving vector quantization
419  DF  .~.~.~> Coding element controlled by buffer fullness (e.g., adaptive quantizer)

DEFINITION

Classification: 348/409

Involving difference transmission (e.g., predictive):

(under subclass 390) Subject matter wherein an output signal represents the difference between the input signal and a predicted value.

(1) Note. The predicted signal may be the preceding signal.