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1. 发明授权

US06725412B1 Low latency data encoder 有权
标题翻译：低延迟数据编码器
公开(公告)号：US06725412B1
公开(公告)日：2004-04-20
申请号：US09639012
申请日：2000-08-15
申请人： Michael J. Smithers , Michael M. Truman , Stephen D. Vernon , Kenneth J. Gundry
发明人： Michael J. Smithers , Michael M. Truman , Stephen D. Vernon , Kenneth J. Gundry
IPC分类号： H03M1300
CPC分类号： H03M13/09 , G11B20/1803
摘要： Codeword-position-caused encoder latency is reduced by avoiding the requirement for knowledge of the message prior to generating an error detecting or concealing codeword associated with the message. A pseudo error detecting or concealing codeword is inserted in place of the normal error detecting or concealing codeword appropriate for the segment of information to which the error detecting or concealing codeword relates. In order to satisfy the requirement of conventional decoders, the pseudo error detecting or concealing information must match or be appropriate for the segment so that the decoder sees the codeword and message segment as valid or error free. This is accomplished by modifying or perturbing at least a portion of the segment to which the pseudo codeword relates. The invention is particularly useful for maintaining the backward compatibility of audio data encoding formats in which the minimum latency is too long (e.g., computer games, where the player performs some operation leading to a sound, and that sound must not be perceptibly delayed with respect to the operation).
摘要翻译：通过在产生与该消息相关联的错误检测或隐藏代码字之前避免对消息的知识的要求来减少代码字位置引起的编码器等待时间。插入伪错误检测或隐藏代码字来代替适合于错误检测或隐藏代码字所关联的信息段的正常错误检测或隐藏代码字。为了满足常规解码器的要求，伪错误检测或隐藏信息必须与段匹配或适合，使得解码器将码字和消息段视为有效或无错误。这是通过修改或扰乱伪码字所涉及的段的至少一部分来实现的。本发明对于维持其中最小等待时间太长的音频数据编码格式（例如，玩家执行导致声音的某种操作的计算机游戏）的向后兼容性特别有用，并且该声音不能被明显地延迟到操作）。

2. 发明授权

US06807528B1 Adding data to a compressed data frame 失效
标题翻译：将数据添加到压缩数据帧
公开(公告)号：US06807528B1
公开(公告)日：2004-10-19
申请号：US09851589
申请日：2001-05-08
申请人： Michael M. Truman , Matthew A. Watson
发明人： Michael M. Truman , Matthew A. Watson
IPC分类号： G10L2104
CPC分类号： G10L19/002
摘要： Many low bit rate digital audio encoding systems, including Dolby Digital and MPEG-2 AAC generate data streams in which unused dummy, fill, stuffing, or null bits exist whenever the bit allocation function in the encoder does not utilize all available bits from a bit pool. Instead, all or some of such wasted bits are used to carry information. This can be accomplished after an encoder generates a bitstream. The resulting bitstream is analyzed to identify the locations of some or all of the unused bits. Some or all of the identified unused bits are then replaced with information-carrying bits to embed information-carrying bits in locations formerly occupied by unused bits. Alternatively, instead of replacing some or all unused bits in the bitstream with information-carrying bits after encoding, a modified encoder may insert information-carrying bits in some or all of the unused bit positions during the encoding process.
摘要翻译：包括杜比数字和MPEG-2 AAC在内的许多低比特率数字音频编码系统产生数据流，其中当编码器中的位分配功能不利用来自一位的所有可用位时，不存在未使用的虚拟，填充，填充或空位游泳池相反，所有或一些这种浪费的比特用于携带信息。这可以在编码器生成比特流之后实现。分析所得比特流以识别部分或全部未使用位的位置。所识别的未使用的位中的一些或全部随后被信息携带位替换，以将信息携带位嵌入以前被未使用位占据的位置。或者，代替在编码之后用信息携带位替换比特流中的一些或所有未使用的比特，修改的编码器可以在编码处理期间将部分或全部未使用的比特位置插入信息携带比特。

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