US 5,850,574 AGranted

Apparatus for voice encoding/decoding utilizing a control to minimize a time required upon encoding/decoding each subframe of data on the basis of word transfer information

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorMaho Takita

Life of this patent

Estimating the term…

Loading patent…

Abstract

A voice encoding/decoding apparatus has a data buffer holding voice data and encoded data, a decoding process unit which receives the voice data of one subframe from the data buffer to decodes the same and outputs obtained encoded data of one subframe to the data buffer, a decoding process unit which receives the encoded data of one subframe from the data buffer to decodes the same and outputs obtained voice data of one subframe to the data buffer, a frame synchronization detecting unit, a first clock generating unit providing timing of inputting/outputting the voice data to/from the data buffer, a second clock generating unit providing timing of inputting/outputting the encoded data to/from the data buffer, a word transfer information providing unit providing the number of words of the voice data and the number of words of the encoded data to be inputted/outputted to/from the data buffer, and information about positions of the voice data and the encoded data in the data buffer, and a control unit minimizing a time required from an inputting to an outputting of the data upon encoding and decoding the data of each subframe on the basis of the information provided by the word transfer information providing unit.

Claims5

Dependent claims

A voice encoding/decoding apparatus for encoding inputted voice data and outputting said voice data as encoded data, while decoding inputted encoded data and outputting said encoded data as voice data comprising:

a data buffer for holding voice data inputted and outputted through an I/O port and encoded data inputted and outputted through another I/O port;
a voice encoding means receiving said voice data of one subframe from said data buffer to encode said voice data to obtain encoded data and outputting said encoded data of one subframe to said data buffer;
a voice decoding means receiving said encoded data of one subframe from said data buffer to decode said encoded data to obtain voice data and outputting said voice data of one subframe to said data buffer;
a frame synchronization detecting means for detecting a position of a synch bit attached to said encoded data held in said data buffer;
a first clock generating means for providing timing of inputting and outputting said voice data to and from said data buffer;
a second clock generating means for providing timing of inputting and outputting said encoded data to and from said data buffer;
a word transfer information providing means for providing the number of words of said voice data to be inputted to and outputted from said data buffer, the number of words of said encoded data to be inputted to and outputted from said data buffer, information about a position of said voice data in said data buffer, and information about a position of said encoded data in said data buffer;
and
a control means for minimizing a time required from an inputting of said voice data to an outputting of said encoded data upon encoding said voice data of each subframe and a time required from an inputting of said encoded data to an outputting of said voice data upon decoding said encoded data of each subframe on the basis of said number of words of said voice data, said number of words of said encoded data, said information about a position of said voice data in said data buffer and said information about a position of said encoded data in said data buffer provided by said word transfer information providing means.

6 more elements

a data buffer for holding voice data inputted and outputted through an I/O port and encoded data inputted and outputted through another I/O port;
a voice encoding means receiving said voice data of one subframe from said data buffer to encode said voice data to obtain encoded data and outputting said encoded data of one subframe to said data buffer;
a voice decoding means receiving said encoded data of one subframe from said data buffer to decode said encoded data to obtain voice data and outputting said voice data of one subframe to said data buffer;
a first clock generating means for providing timing of inputting and outputting said voice data to and from said data buffer;
a second clock generating means for providing timing of inputting and outputting said encoded data to and from said data buffer;
a word transfer information providing means for providing the number of words of said voice data to be inputted to and outputted from said data buffer, the number of words of said encoded data to be inputted to and outputted from said data buffer, information about a position of said voice data in said data buffer, and information about a position of said encoded data in said data buffer;
and
a control means for minimizing a time required from an inputting of said voice data to an outputting of said encoded data upon encoding said voice data of each subframe and a time required from an inputting of said encoded data to an outputting of said voice data upon decoding said encoded data of each subframe on the basis of said number of words of said voice data, said number of words of said encoded data, said information about a position of said voice data in said data buffer and said information about a position of said encoded data in said data buffer provided by said word transfer information providing means.

5 more elements

Dependencies are inferred from the claim text.