Multimedia signal coding device and method of controlling amount of output code thereof
AssigneeNEC Corporation
InventorMayumi Nagasaki
Life of this patent
Estimating the term…
Abstract
Output code amount control circuit 150 confirms an accumulated amount of audio data stored in audio data buffer 111, an accumulated amount of image data stored in image data buffer 122 and an accumulated amount of control data stored in control data buffer 132 and determines a control method for controlling an amount of coded image data outputted from image coding circuit 121. Image coding circuit 121 performs a coding operation of an image signal inputted through image input terminal 120 while controlling the amount of the coded image data to be outputted, according to the control method notified by output code amount control circuit 150 and the coded image data is stored in image data buffer 120.
Claims11
A multimedia signal coding comprising:
- audio signal coding means for coding an input audio signal;
- audio data memory means for temporarily storing a coded output of said audio signal coding means;
- image signal coding means for coding an input image signal while controlling an amount of output data according to an external control signal
- coded image data memory means for temporarily storing a coded output of said image signal coding means;
- control data processing means for performing a predetermined data processing for an input control data;
- control data memory means for temporarily storing an output of said control data processing means;
- multiplexing means for multiplexing the data stored in said audio data memory means, said image data memory means and said control data memory means;
- and
- output code amount control means for generating a control signal for controlling an amount of output data of said image coding means on the basis of the output data amount of said multiplexing means and notifying the generated control signal to said image signal coding means.
An output code amount control method of a multimedia signal coding device for coding signals of different kinds including an audio signal, an image signal and a control data, respectively, multiplexing the coded data and then transmitting the multiplexed data, comprising the step of controlling an amount of image data obtained by coding the image signal, correspondingly to data amounts of respective kinds of codes before or after the multiplexing process.
Dependencies are inferred from the claim text.