Format converter architecture

Details Format converter architecture Format converter architecture

1991-05-28

1993-04-06

Hoff, Marc

Coded data generation or conversion

Digital code to digital code converters

Unnecessary data suppression

358140, H04N 701

Patent

active

052007499

ABSTRACT:
A format converter for converting an input signal having a specified format to a digital signal of a pre-existing format, and for converting the digital signal back to the input signal automatically, loads an active data portion of the input signal into an input first-in/first-out (FIFO) buffer at a first data rate and reads the active data portion together with dummy filler samples from the FIFO at a second data rate as the digital signal. The number, location and/or values of the filler samples identify the specified format. In reverse the filler samples are stripped from the digital signal and the resulting active samples are loaded into an output FIFO at the second data rate. The stripped filler samples are used to determine the specified format of the original source of the data signal, and the active samples are read from the output FIFO at the first data rate in the specified format to reproduce the input signal.

REFERENCES:
patent: 4306249 (1981-12-01), Croll
patent: 4468708 (1984-08-01), Coleman, Jr.
patent: 4533958 (1985-08-01), Herget
patent: 4884138 (1989-11-01), Storey
patent: 5001562 (1991-03-01), Tabata et al.
patent: 5023717 (1991-06-01), Lamnabhi et al.
patent: 5031040 (1991-07-01), Maruyama

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