Video bit stream decoding system and method used in a video decoding apparatus

A video decoding apparatus for decoding an encoded video bit stream to produce pixel data of a first macroblock and a second macroblock, the video bit stream comprising at least one video packet, the video packet comprising in sequential order a packet header, a first logic unit, a second logic unit, and a third logic unit, the first logic unit comprising parameters a1 and b1, the second logic unit comprising parameters a2 and b2, the third logic unit comprising parameters a3 and b3, the parameters a1 and a2 used for reconstructing a first macroblock, the parameters b1 and b2 used for reconstructing a second macroblock, the video decoding apparatus comprising:

• a searching module for locating a first address indicating location of the first logic unit, a second address indicating location of the second logic unit;
• a decoding module for decoding the first logic unit to obtain a decoded parameter A1 corresponding to the parameter a1, decoding the second logic unit to obtain a decoded parameter A2 corresponding to the parameter a2, and decoding the third logic unit to obtain a decoded parameter A3 corresponding to the parameter a3,
• wherein the decoded parameters A1, A2, and A3 are used to produce the pixel data of the first macroblock.

The video decoding apparatus of clam 10, wherein the decoding module further includes a plurality of decoders to decode the first logic unit, the second logic unit, and the third logic unit in a parallel manner.

The video decoding apparatus of clam 11, wherein the plurality of decoders are variable length decoders.

The video decoding apparatus of clam 10, wherein the decoding module further include a variable length decoder to sequentially decode the first logic unit, the second logic unit, and the third logic unit.

The video decoding apparatus of clam 10, wherein the searching module locates the first address by locating the packet header.

The video decoding apparatus of clam 10, wherein the searching module locates the second address by searching for a resynchronization marker.

The video decoding apparatus of clam 10, wherein the searching module locates a third address indicating location of the third logic unit by decoding the second logic unit.

A method for decoding an encoded video bit stream to produce pixel data of a first macroblock and a second macroblock, the video bit stream comprising at least one video packet, the video packet comprising a first logic unit and a second logic unit, the first logic unit comprising parameters a1 and b1, the second logic unit comprising parameters a2 and b2, the parameters a1 and a2 used for reconstructing a first macroblock, the parameters b1 and b2 used for reconstructing a second macroblock, the method comprising:

• a first step of locating a first address indicating location of the first logic unit and locating a second address indicating location of the second logic unit;
• a second step of decoding the first logic unit to obtain a decoded parameter A1 corresponding to the parameter a1 and decoding the second logic unit to obtain a decoded parameter A2 corresponding to the parameter a2, and
• a third step of producing the pixel data of the first macroblock using the decoded parameters A1 and A2.