KR950002251A - Variable length code decoding device - Google Patents

Abstract

The present invention aims to increase the processing speed in variable length decoding of a variable length coded video signal and to simplify an apparatus for processing data, wherein the variable length coded data signal stored in a buffer is read from the read signal generating means. A variable length decoding apparatus for outputting in accordance with a control signal, processing the signal through a signal processing means, and then performing variable length decoding using a decoding table means, wherein the signal processing means is configured to output a variable length code data signal output from a buffer in synchronization with a clock signal. The first latch means for latching and the variable length code data signal output from the buffer are the lower bits, and the latched variable length code data signal from the first latch means is the upper bit, and the second latch means connected to one side is connected. Decode the variable length code data signal shifted based on the shift value And a shift value for the next variable length code according to the code length value and the previous code length value inputted from the code length table through a plurality of bit lines and a plurality of bit lines. Addition means for outputting a carry to the read signal generating means when the code length value of the variable length code is equal to or greater than the code length value; and second latch means for outputting the updated code length value of the addition means as a shift value to the bevel shifter in synchronization with a clock signal. It is made up.

Description

Variable length code decoding device

Since this is an open matter, no full text was included.

1 is a block diagram of a variable length code decoding apparatus according to the present invention, and FIGs. 2 and 3 are flowcharts and timing diagrams of a berel shifter employed in the variable length code decoding apparatus of the present invention shown in FIG.

Claims (2)

The variable-length coded data signal stored in the buffer is output in accordance with the control signal from the read signal generating means, processed by the signal processing means, and then variable length through the decode table means consisting of a codeword table, a code length table and a codeword table. A variable length decoding apparatus for decoding, the signal processing means comprising: first latch means for latching a variable length code data signal output from the buffer in synchronization with a clock signal; The variable length code data signal outputted from the buffer is a lower bit, and the latched variable length code data signal from the first latch means is an upper bit and based on a shift value from the second latch means connected to one side. A berel shifter unit for outputting a shifted variable length code data signal to the decoding table; Assigns a shift value for the next variable length code according to a code length value input from the code length table and a previous code length value through a plurality of bit lines, and the updated code length value is equal to or greater than the encoding length value of the variable length code. Adding means for outputting a carry to said read signal generating means; And second latch means for outputting the updated code length value of said adding means in synchronism with said clock signal to said bevel shifter portion as a shift value. The variable length code decoding apparatus of claim 1, wherein the plurality of bit lines are five bit lines. ※ Note: The disclosure is based on the initial application.