The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Jul. 30, 1984
Takao Nishitani, Tokyo, JP;
NEC, Tokyo, JP;
Abstract
In an adaptive encoder encoding an encoder input signal into an encoder output signal by carrying out adaptive prediction, an encoder calculation circuit calculates electric power of an encoder electric signal related to the encoder input signal and the encoder output signal. The adaptive prediction is interrupted by an encoder interruption circuit when the electric power is not greater than a reference electric power. The electric signal may be either the encoder input signal or the encoder output signal. Preferably, a local decoded signal is monitored as the encoder electric signal by the encoder calculation circuit. When adaptive quantization is carried out in the encoder, an adaptive step size may be given as the electric signal to the encoder calculation circuit. An adaptive decoder comprises a decoder calculation circuit for calculating electric power of a decoder electric signal related to either a decoder input signal or a decoder output signal in a manner similar to the encoder calculation circuit. A decoder interruption circuit interrupts adaptive operation in the decoder like the encoder interruption circuit.