Method for controlling a compressed data buffer

Details Method for controlling a compressed data buffer Method for controlling a compressed data buffer

1996-10-29

1999-05-25

Lee, Richard

Television

Bandwidth reduction system

Data rate reduction

348390, H04N 724

Patent

active

059073632

ABSTRACT:
A system and method controls an encoder data buffer. The system includes an encoder for encoding input data as a first bit sequence in a bitstream; a processor having a predetermined size for converting the first bit sequence to a sequence having the predetermined size; and a decoder for decoding the modified bit sequence. The processor generates a set of modified bit sequences for facilitating editing thereof, in which the set of modified bit sequences, assembled in an arbitrary order, are decodeable by the decoder to generate a decoded output signal free of editing artifacts. The modified bit sequences are generated by inserting bits to the first bit sequence. The encoder encodes the input data at a rate such that a final capacity of the data buffer is less than a function of the predetermined size, a desired decoding rate, and an initial capacity of the encoder buffer. The data buffer has a total buffer capacity which is less than a function of the actual rate and the desired decoding rate. The capacity of the data buffer is less than one half the capacity of the decoder buffer. A method controls a data buffer by receiving input data; encoding the input data to generate a first bit sequence; detecting a condition of the first bit sequence having a size of less than a predetermined size; converting the first bit sequence to sets of modified bit sequences having the predetermined size; receiving the bitstream; and decoding the modified bit sequences.

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