Patent ID: 7826529
Filing Date: 2010-11-02
Classification: H04N

Abstract:
1. An H.263/MPEG video encoder for efficiently controlling bit rates, the H.263/MPEG video encoder performing a discrete cosine transform (DCT) for an input image (N−1), quantizing the input image to output the input image as a video stream, decoding the quantized signal utilizing inverse quantization (IQ) and inverse discrete cosine transform (IDCT), and performing motion estimation in comparison with a next input image (N), the H.263/MPEG video encoder comprising: an analyzing section for analyzing a size of data to be quantized using a result of the motion estimation; a control section for controlling a quantization value for the quantization according to an analysis result of the analyzing section; and a frame rate control section for controlling a frame speed of the output of the video stream; wherein, before the discrete cosine transform (DCT) and the quantization (Q) are performed, the control section determines whether a bit-rate control for each (Group Of Blocks) GOB is performed on one of a GOB unit basis and on a macroblock unit basis, according to values stored in the analyzing section, and performs a control according to a result of the determination; and wherein, after encoding one frame, the frame rate control section increases an encoding time up to a rate of an exceeding amount when a predetermined bit amount assigned by the frame is exceeded, and the frame rate control section uses a remaining bit amount in a next frame when a predetermined bit amount assigned by the frame has not all been used.