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公开(公告)号：KR100317228B1
公开(公告)日：2002-02-19
申请号：KR1019980054166
申请日：1998-12-10
Applicant: 한국전자통신연구원
Abstract: 본 발명은 압축된 동영상에 대해 다양한 시각 특수 효과를 주는 시각 효과 필터 및 그 영상처리 기법에 관한 것으로서, 동영상에 시각 특수 효과 처리를 할 때, 복호화 과정을 거치지 않고 압축 영역(DCT or DCT-compressed domain)에서 시각 특수 효과 처리를 하거나, 부분적으로만 복호화한 후 처리하여, 종래 공간 영역(spatial domain)에서 시각 특수 효과 처리를 하는 방법에 비해 더욱 효율적이고, 낮은 자료율(data rate)을 가질 수 있도록 한 것이다.
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公开(公告)号：KR1020000038978A
公开(公告)日：2000-07-05
申请号：KR1019980054166
申请日：1998-12-10
Applicant: 한국전자통신연구원
CPC classification number: H04N19/625 , H04N5/262 , H04N19/176
Abstract: PURPOSE: A method for processing a special effect of a compressed picture is provided to reduce an amount of calculation and the number of blocks for calculating a motion compensation(MC) when a visual special effect is added to a compressed moving picture, by processing the visual special effect in a discrete cosine transform(DCT) domain or in a DCT-compressed domain, and processing it after a partial decoding. CONSTITUTION: An input picture is divided to small blocks which are subjected to a motion compensation and converted to DCT coefficients by a DCT part(3) in an encoder. A motion estimation circuit(1) searches an optimal reference block and outputs a motion vector. The DCT coefficients are quantized by a quantization part(5). The output of the quantization part(5) is subjected to a run length coding in order to minimize the duplication of zeros, and then to a variable length coding in a part(7) which outputs an estimated offset. The DCT domain and DCT-compressed domain denote the quantized DCT coefficients which can be obtained from an inverse quantization part(9) in a decoder.
Abstract translation: 目的：提供一种用于处理压缩图像的特殊效果的方法，以便当将视觉特效添加到压缩运动图像时，通过处理压缩图像的处理来减少计算量和用于计算运动补偿（MC）的块数 在离散余弦变换（DCT）域或DCT压缩域中的视觉特效，并在部分解码之后对其进行处理。 构成：输入图像被划分为经过运动补偿的小块，并且由编码器中的DCT部分（3）转换成DCT系数。 运动估计电路（1）搜索最佳参考块并输出运动矢量。 DCT系数由量化部（5）量化。 对量化部分（5）的输出进行游程长度编码，以便最小化零的复制，然后在输出估计偏移的部分（7）中进行可变长度编码。 DCT域和DCT压缩域表示可以从解码器中的逆量化部分（9）获得的量化DCT系数。
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