| 摘要 |
A motion vector high-speed decoding circuit is provided, which can decode a motion vector of the MPEG-2 standard at high speed. The motion vector high-speed decoding circuit realizes a motion vector decoding method using an exclusive-use hardware of a pipeline method, which includes a parameter store (10) for storing the input motion vector decoding parameter, that is, a motion vector range determination code, a motion vector code, and a motion vector residual code, a motion vector decoder (20) for storing a motion vector to be decoded as a previous motion vector and decoding the motion vector using the parameter stored in the parameter store (10) and the previous motion vector, a dual primer (50) for receiving the previous motion vector stored in the motion vector decoder (20) and generating a number of dual motion vectors, and a motion vector controller (30) for controlling the operations of all the elements via the input parameters and selecting one between the previous motion vector and the dual motion vector, to output the selected result as a finally decoded motion vector. Six-clock periods are needed to decode one motion vector, and 6+(n-1)-clock periods are needed to decode n motion vectors via a pipeline processing, which enables the high-speed decoding circuit to be applied to a high-speed system such as a high-definition television. <IMAGE> |
