公开(公告)号：KR1020020045366A

公开(公告)日：2002-06-19

申请号：KR1020000074799

申请日：2000-12-08

Applicant: 삼성전자주식회사

Inventor： 유국열 ,  김윤수 ,  김재균 ,  서광덕 ,  노규찬 ,  허성철

IPC: H04N19/40

CPC classification number: H04N19/40 ,  H04N19/126 ,  H04N19/14 ,  H04N19/18 ,  H04N19/20 ,  H04N19/61 ,  H04N19/70

Abstract: PURPOSE: A transcoding device is provided to convert a digital bit stream having a quantizer without a dead zone into a digital bit stream having a quantizer having a dead zone, thereby easily converting bit streams having the same or different compression methods. CONSTITUTION: A VLD(Variable Length Decoding) block(1302) restores syntax elements and video elements from the first bit stream in accordance with the first compression method. An MPEG-4 dequantization block(1304) dequantizes the video elements with the first compression method, and restores video data. An MPEG-4 quantization block(1306) re-quantizes the video data according to the second compression method. A syntax generator(1310) maps the syntax elements to syntax elements in accordance with the second compression method. A VLC(Variable Length Coding) block(1308) outputs a coded second bit stream according to the second compression method for the quantized video data and the syntax elements.

Abstract translation: 目的：提供一种代码转换装置，用于将没有死区的量化器的数字比特流转换为具有死区的量化器的数字比特流，从而容易地转换具有相同或不同压缩方法的比特流。 构成：根据第一压缩方法，VLD（可变长度解码）块（1302）从第一位流恢复语法元素和视频元素。 MPEG-4去量化块（1304）利用第一压缩方法去量化视频元素，并恢复视频数据。 MPEG-4量化块（1306）根据第二压缩方法重新量化视频数据。 语法生成器（1310）根据第二压缩方法将语法元素映射到语法元素。 VLC（可变长度编码）块（1308）根据用于量化视频数据和语法元素的第二压缩方法输出编码的第二比特流。

公开(公告)号：KR100433516B1

公开(公告)日：2004-05-31

申请号：KR1020000074799

申请日：2000-12-08

Applicant: 삼성전자주식회사

Inventor： 유국열 ,  김윤수 ,  김재균 ,  서광덕 ,  노규찬 ,  허성철

IPC: H04N19/40

CPC classification number: H04N19/40 ,  H04N19/126 ,  H04N19/14 ,  H04N19/18 ,  H04N19/20 ,  H04N19/61 ,  H04N19/70

Abstract: A transcoding method and apparatus for converting a digital bitstream complying with a certain compression method into a digital bitstream complying with a different (or the same) compression method is provided. The transcoding apparatus performs conversion between compressed bitstreams having at least syntax elements and video elements corresponding to video data. The transcoding apparatus includes a decoder for reconstructing syntax elements and video elements from a first bitstream complying with a first compression method, an inverse quantizer for inverse-quantizing the video elements provided from the decoder according to the first compression method to reconstruct video data, a quantizer for requantizing the video data according to a second compression method, a syntax generator for mapping the syntax elements provided from the decoder to syntax elements complying with the second compression method, and an encoder for encoding the requantized video data (video elements complying with the second compression method) provided from the quantizer and the syntax elements provided from the syntax generator according to the second compression method, thereby outputting a second bitstream. The transcoding method facilitates the conversion between bitstreams complying with the same or different compression methods.

Abstract translation: 提供了用于将符合特定压缩方法的数字比特流转换为符合不同（或相同）压缩方法的数字比特流的代码转换方法和装置。 代码转换装置执行至少具有语法元素的压缩比特流与对应于视频数据的视频元素之间的转换。 该代码转换装置包括：解码器，用于根据符合第一压缩方法的第一比特流重建语法元素和视频元素;逆量化器，用于根据第一压缩方法对从解码器提供的视频元素进行逆量化，以重建视频数据; 量化器，用于根据第二压缩方法重新量化视频数据;语法生成器，用于将从解码器提供的语法元素映射到符合第二压缩方法的语法元素;以及编码器，用于编码重新量化的视频数据（符合 第二压缩方法）和根据第二压缩方法从语法生成器提供的语法元素，从而输出第二比特流。 转码方法有利于符合相同或不同压缩方法的比特流之间的转换。