| 摘要 |
PURPOSE: An apparatus and method for controlling a bit rate of a moving image coder are provided to convert an inputted variable while a bit rate adjusting device used in a moving picture coder is operated and to monitor variables and a result value used while a bit rate adjustment is performed. CONSTITUTION: A bit rate control unit comprises a control signal generating unit(20), a DPRAM(Dual Port RAM)(30) and a digital signal processing unit(40). That is, the bit rate control unit comprises a portion generating a control signal for reading/writing to the DPRAM(30), a memory portion for making two ports read/write independently and a portion for adjusting a substantial bit rate. The control signal generating unit(20) comprises an interrupt generating unit(21) and an address decoder(22). The interrupt generating unit(21) generates an interrupt signal used as an input of the digital signal processing unit(40). The bit rate control unit is operated by being synchronized with an interrupt signal being generated from the interrupt generating unit(21). Data which are downloaded in the DPRAM(30) are read through another port of the DPRAM(30) and output to the digital signal processing unit(40) for performing a calculation for a substantial bit rate adjustment. |
