1. A syntax parsing apparatus comprising: a plurality of syntax parsing circuits, each having at least entropy decoding capability, wherein the syntax parsing circuits are arranged to generate a plurality of entropy decoding results of a plurality of image regions within a same frame, respectively; and a dispatcher, arranged to assign bitstream start points of the image regions to the syntax parsing circuits and trigger the syntax parsing circuits to start entropy decoding, respectively; wherein the syntax parsing circuits comprise: a first syntax parsing circuit, arranged to perform entropy decoding upon a first image region included in the image regions during a first processing time period; and a second syntax parsing circuit, arranged to perform entropy decoding upon a second image region included in the image regions during a second processing time period, wherein the second processing time period is overlapped with the first processing time period.