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    • 6. 发明授权
    • MPEG-4 encoder using H.263 multimedia chip
    • MPEG-4编码器采用H.263多媒体芯片
    • US07356080B2
    • 2008-04-08
    • US10702745
    • 2003-11-06
    • Hyun-Seung LeeJi-Ho ParkDae-Kyu ShinSeung-Cheol Lee
    • Hyun-Seung LeeJi-Ho ParkDae-Kyu ShinSeung-Cheol Lee
    • H04B1/66H04N7/12H04N11/02H04N11/04
    • H04N19/40H04N19/124H04N19/157H04N19/196H04N19/42H04N19/593H04N19/61H04N19/63H04N19/70H04N19/91
    • An MPEG-4 encoder utilizing an H.263 multimedia chip. The MPEG-4 encoder includes a DC (Direct Current) predictor for predicting a DC component of the image frame encoded by an H.263 standard upon receiving a prescribed MPEG-4 quantization value, and an MPEG-4 reconstruction image memory for converting the H.263 reconstruction image into an MPEG-4 reconstruction image, and storing the MPEG-4 reconstruction image. The MPEG-4 encoder removes spatial redundancy from source image data entered in frame units using a prescribed H.263 quantization value, predicts a DC component of an image frame having no spatial redundancy using a prescribed MPEG-4 quantization value, performs a VLC (Variable Length Coding) process on the image frame using the predicted DC component, and outputs the VLC-processed image frame in the form of an MPEG-4 bit stream. The MPEG-4 encoder reconstructs the image frame having no spatial redundancy, stores the reconstructed image frame, converts the reconstructed image frame into an MPEG-4 frame, stores the MPEG-4 frame, compares the stored image frame with a newly-entered next frame, and removes temporal redundancy according to a result of the comparison.
    • 一种使用H.263多媒体芯片的MPEG-4编码器。 MPEG-4编码器包括DC(直流)预测器,用于在接收到规定的MPEG-4量化值时预测由H.263标准编码的图像帧的DC分量,以及MPEG-4重建图像存储器,用于将 H.263重建图像转换为MPEG-4重建图像,并存储MPEG-4重建图像。 MPEG-4编码器使用规定的H.263量化值从以帧为单位输入的源图像数据中去除空间冗余,使用规定的MPEG-4量化值预测没有空间冗余的图像帧的DC分量,执行VLC( 可变长度编码)处理,并且以MPEG-4比特流的形式输出VLC处理的图像帧。 MPEG-4编码器重建没有空间冗余的图像帧,存储重建的图像帧,将重建的图像帧转换成MPEG-4帧,存储MPEG-4帧,将存储的图像帧与新输入的下一个 并根据比较结果去除时间冗余。
    • 9. 发明授权
    • H.263/MPEG video encoder for efficiently controlling bit rates and method of controlling the same
    • 用于有效控制比特率的H.263 / MPEG视频编码器及其控制方法
    • US07826529B2
    • 2010-11-02
    • US10925623
    • 2004-08-25
    • Seung-Cheol LeeDae-Kyu ShinJi-Ho ParkHyun-Seung Lee
    • Seung-Cheol LeeDae-Kyu ShinJi-Ho ParkHyun-Seung Lee
    • H04N7/12
    • H04N19/174H04N19/124H04N19/139H04N19/14H04N19/172H04N19/176
    • An H.263/MPEG video encoder using DCT in a mobile communication terminal. The H.263/MPEG video encoder controls a quantization value using granularity analysis by motion estimation and efficiently controls bit rates. The H.263/MPEG video encoder performs DCT for an input image (N−1), quantizes the input image to output the input image as a video stream, decodes the quantized signal by means of inverse quantization (IQ) and inverse discrete cosine transform (IDCT), and performs motion estimation in comparison with a next input image (N). The H.263/MPEG video encoder includes a granularity analyzing section for analyzing granularity using a result of performing the motion estimation, a granularity control section for controlling a quantization value for the quantization according to an analysis result of the granularity analyzing section, and a frame rate control section for controlling a frame speed of an output of the video stream.
    • 一种在移动通信终端中使用DCT的H.263 / MPEG视频编码器。 H.263 / MPEG视频编码器通过运动估计使用粒度分析来控制量化值,并有效地控制比特率。 H.263 / MPEG视频编码器对输入图像(N-1)进行DCT,对输入图像进行量化,将输入图像输出为视频流,通过逆量化(IQ)和反相离散余弦对量化信号进行解码 变换(IDCT),并且与下一个输入图像(N)进行运动估计。 H.263 / MPEG视频编码器包括:使用执行运动估计的结果分析粒度的粒度分析部分;粒度控制部分,用于根据粒度分析部分的分析结果控制量化量化值;以及 帧速控制部分,用于控制视频流的输出的帧速度。