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51. 发明授权

US06647061B1 Video size conversion and transcoding from MPEG-2 to MPEG-4 有权
标题翻译：视频尺寸转换和从MPEG-2到MPEG-4的转码
公开(公告)号：US06647061B1
公开(公告)日：2003-11-11
申请号：US09590928
申请日：2000-06-09
申请人： Krit Panusopone , Xuemin Chen
发明人： Krit Panusopone , Xuemin Chen
IPC分类号： H04N712
CPC分类号： H04N21/23439 , H04N19/105 , H04N19/112 , H04N19/132 , H04N19/137 , H04N19/196 , H04N19/198 , H04N19/20 , H04N19/40 , H04N19/59 , H04N19/70 , H04N21/234309 , H04N21/23608
摘要： A transcoder architecture that provides the lowest possible complexity with a small error, e.g., for converting an MPEG-2 bitstream into an MPEG-4 bitstream. The transcoder reads header information from an input bitstream and provides a corresponding header in the new format for the output bitstream. In one embodiment, a low complexity front-to-back transcoder (with B frames disabled) avoids the need for motion compensation processing. In another embodiment, a transcoder architecture that minimizes drift error (with B frames enabled) is provided. In another embodiment, a size transcoder (with B frames enabled) is provided, e.g., to convert a bitstream of ITU-R 601 interlaced video coding with MPEG-2 MP@ML into a simple profile MPEG-4 bitstream which contains SIF progressive video suitable for a streaming video application. For spatial downscaling of field-mode DCT blocks, vertical and horizontal downscaling techniques are combined to use sparse matrixes to reduce computations.
摘要翻译：一种代码转换器架构，其以较小的误差提供最低可能的复杂度，例如用于将MPEG-2比特流转换为MPEG-4比特流。代码转换器从输入比特流读取头信息，并以输出比特流的新格式提供对应的头。在一个实施例中，低复杂度的前后转码器（B帧被禁用）避免了对运动补偿处理的需要。在另一个实施例中，提供使漂移误差最小化（启用B帧）的代码转换器体系结构。在另一个实施例中，提供了一种尺寸代码转换器（启用了B帧），例如，将MPEG-2 MP @ ML的ITU-R 601隔行视频编码的比特流转换成包含SIF逐行视频的简单配置文件MPEG-4比特流适合流媒体视频应用。对于场模式DCT块的空间缩小，垂直和水平缩小技术被组合以使用稀疏矩阵来减少计算。

52. 发明授权

US06647060B1 Video compression device and video compression method 有权
标题翻译：视频压缩设备和视频压缩方式
公开(公告)号：US06647060B1
公开(公告)日：2003-11-11
申请号：US09312887
申请日：1999-05-17
申请人： Hiroaki Ueda
发明人： Hiroaki Ueda
IPC分类号： H04N712
CPC分类号： H04N19/587 , H04N19/132
摘要： A frame receiving unit calculates the number of a frame to be compressed and gets an image data from the frame. A frame checking unit checks the type of the frame and allocates required code memory. When the frame is an I frame, a frequency conversion unit converts the image to a spatial frequency, a quantization unit quantizes the spatial frequency, and a variable-length coding unit performs variable-length coding. At the same time, a reverse quantization unit performs reverse-quantization and a reverse frequency conversion unit performs reverse-conversion to create a reference image. When the frame is a P frame, a motion search unit searches for a motion of the image. The frequency conversion unit converts a difference between the image and the reference image to the spatial frequency, the quantization unit performs quantization, and the variable-length coding unit performs variable-length coding. At the same time, the reverse quantization unit performs reverse-quantization, the reverse frequency conversion unit performs reverse frequency conversion to return the reverse conversion result to the difference of the images, and a motion compensation unit combines the result with a motion-compensated reference image. When the frame is a B frame, a code indicating that the frame is the same as the reference frame is generated. The generated code is output to the allocated code memory.
摘要翻译：帧接收单元计算要压缩的帧的数量并从帧获得图像数据。帧检查单元检查帧的类型并分配所需的代码存储器。当帧为I帧时，频率转换单元将图像转换为空间频率，量化单位量化空间频率，可变长度编码单元执行可变长度编码。同时，反向量化单元进行反向量化，反向频率转换单元进行反向转换以产生参考图像。当帧是P帧时，运动搜索单元搜索图像的运动。频率转换单元将图像和参考图像之间的差异转换为空间频率，量化单元执行量化，并且可变长度编码单元执行可变长度编码。同时，反向量化单元进行逆量化，反向频率转换单元进行反向频率转换，将反向转换结果返回到图像的差异，运动补偿单元将结果与运动补偿基准图片。当帧是B帧时，生成指示帧与参考帧相同的代码。生成的代码被输出到分配的代码存储器。

53. 发明授权

US06643329B1 Method and apparatus for dynamic pipelining 失效
标题翻译：动态流水线的方法和装置
公开(公告)号：US06643329B1
公开(公告)日：2003-11-04
申请号：US09636390
申请日：2000-08-09
申请人： Qiong Wu , Kwok K. Chau , Toshiaki Yoshino
发明人： Qiong Wu , Kwok K. Chau , Toshiaki Yoshino
IPC分类号： H04N712
CPC分类号： H04N19/423 , H04N19/61
摘要： A decoder is disclosed that provides dynamic pipelining of an incoming compressed bitstream. The decoder includes decoding logic modules capable of decoding an incoming compressed bitstream, and memory storing logic in communication with at least one of the decoding modules. Preferably, the memory storing logic is capable of determining whether a memory operation is complete that stores the uncompressed video data to memory. In addition, the decoder includes halting logic in communication with the decoding logic and the memory storing logic. The halting logic halts the decoding of the incoming bitstream during a specific time period, which includes a time period wherein the memory operation is incomplete. Finally, initiating logic is included in the decoder that is in communication with the decoding logic and the memory storing logic. The initiating logic of the decoder restarts the decoding when the memory operation is complete.
摘要翻译：公开了提供输入压缩比特流的动态流水线的解码器。解码器包括能够解码输入的压缩比特流的解码逻辑模块，以及与至少一个解码模块通信的存储器存储逻辑。优选地，存储器存储逻辑能够确定存储器操作是否完成，将未压缩的视频数据存储到存储器。此外，解码器包括停止与解码逻辑和存储器存储逻辑通信的逻辑。停止逻辑在特定时间段期间停止对输入比特流的解码，其包括其中存储器操作不完整的时间段。最后，起始逻辑包括在与解码逻辑和存储器存储逻辑通信的解码器中。当存储器操作完成时，解码器的启动逻辑重新开始解码。

54. 发明授权

US06643327B1 Statistical multiplexer and remultiplexer that accommodates changes in structure of group of pictures 有权
标题翻译：统计多路复用器和复用多路复用器，适应图像组结构的变化
公开(公告)号：US06643327B1
公开(公告)日：2003-11-04
申请号：US09565960
申请日：2000-05-05
申请人： Limin Wang
发明人： Limin Wang
IPC分类号： H04N712
CPC分类号： H04N21/23655 , H04N19/115 , H04N19/124 , H04N19/152 , H04N19/159 , H04N19/162 , H04N19/172 , H04N19/177 , H04N19/179 , H04N19/40 , H04N19/625
摘要： A system for rate control during transcoding and encoding of digital video data in a multi-program transmission environment accommodates changes in the GOP structure of any of the programs, e.g., due to a commercial insertion or the like. A hierarchical bit allocation scheme is used, where bits are allocated on a super group of pictures (GOP) level, i.e., a grouping of multiple GOPs, a super frame level, and an individual frame level. The bit allocation for the super GOP and each picture is adjusted when a change in the structure of a group of pictures (GOP) is detected for any of the pre-compressed programs. The super GOP length may also be adjusted if required to maintain an integer number of GOPs therein. A change in the GOP structure is detected based on a change in the GOP length or sub_GOP length (distance between P pictures). For pre-compressed data, initial GOP lengths and sub_GOP lengths can be assumed and adjusted as required based on actual measurements. For a current I or P picture, the sub GOP length is calculated based on temporal references of the current picture and a previous I or P picture. For a current B picture, the same calculation is used, plus one picture.
摘要翻译：用于在多节目传输环境中的数字视频数据的代码转换和编码期间的速率控制的系统适应任何节目的GOP结构的改变，例如由于商业插入等。使用分层比特分配方案，其中比特被分配在超级图像组（GOP）级别，即多个GOP，超级帧级别和单独帧级别的分组。当对于任何预压缩的程序检测到一组图像（GOP）的结构的变化时，调整超级GOP和每个图像的比特分配。如果需要，也可以调整超级GOP长度以在其中维持整数个GOP。基于GOP长度或sub_GOP长度（P画面之间的距离）的变化来检测GOP结构的变化。对于预压缩数据，可以根据实际测量的需要假设和调整初始GOP长度和子_GOP长度。对于当前的I或P图像，基于当前图像和先前的I或P图像的时间参考来计算子GOP长度。对于当前的B图像，使用相同的计算，加上一个图像。

55. 发明授权

US06639943B1 Hybrid temporal-SNR fine granular scalability video coding 有权
标题翻译：混合时间SNR精细粒度可扩展性视频编码
公开(公告)号：US06639943B1
公开(公告)日：2003-10-28
申请号：US09590825
申请日：2000-06-09
申请人： Hayder Radha , Yingwei Chen , Mihaela Van Der Schaar
发明人： Hayder Radha , Yingwei Chen , Mihaela Van Der Schaar
IPC分类号： H04N712
CPC分类号： H04N21/654 , H04N19/115 , H04N19/164 , H04N19/172 , H04N19/187 , H04N19/31 , H04N19/34 , H04N19/577 , H04N19/61 , H04N21/6332
摘要： The present invention is directed to fine granular coding technique that includes both quality and temporal scalability. This is accomplished by utilizing a hybrid temporal/SNR scalability structure that is readily adaptable to fine granular coding techniques. In one example of this structure, temporal enhancement frames and FGS enhancement frames are included in a single enhancement layer. In another example, two distinct enhancement layers are used to achieve the hybrid temporal-SNR scalability. The two layers include a temporal scalability layer to achieve the temporal enhancement for the base-layer (i.e., better motion), while an FGS layer is used to improve the quality SNR of the base-layer and/or the temporal-scalability enhancement layer.
摘要翻译：本发明涉及包括质量和时间可伸缩性的精细粒度编码技术。这通过利用易于适应细粒度编码技术的混合时间/ SNR可伸缩性结构来实现。在该结构的一个示例中，时间增强帧和FGS增强帧被包括在单个增强层中。在另一示例中，使用两个不同的增强层来实现混合时间SNR可伸缩性。两层包括实现基层的时间增强（即更好的运动）的时间可伸缩性层，而FGS层用于提高基层和/或时间可扩展性增强层的质量SNR 。

56. 发明授权

US06628719B1 MPEG video decoder and MPEG video decoding method 有权
公开(公告)号：US06628719B1
公开(公告)日：2003-09-30
申请号：US09372039
申请日：1999-08-11
申请人： Tadayoshi Kono , Mitsuhiko Ota , Hirohiko Inagaki
发明人： Tadayoshi Kono , Mitsuhiko Ota , Hirohiko Inagaki
IPC分类号： H04N712
CPC分类号： H04N19/90 , H04N19/127 , H04N19/152 , H04N19/172 , H04N19/423 , H04N19/44 , H04N19/50 , H04N19/61
摘要： A picture decoding section starts to decode a bit-stream for one picture when a decoding start command is supplied from a decoding start command generating section, and outputs a decoding completion command when the decoding is completed. Decoded picture data is stored in a decoding frame buffer. The decoding frame buffer outputs a bufferfull notification when a certain quantity of picture data is stored. The decoding start command generating section outputs the decoding start command to the picture decoding section when a decoding completion command is outputted from the picture decoding section and the bufferfull notification is not outputted from the decoding frame buffer.

57. 发明授权

US06628709B2 Bit number prediction for VLC coded DCT coefficients and its application in DV encoding/transcoding 失效
公开(公告)号：US06628709B2
公开(公告)日：2003-09-30
申请号：US09742535
申请日：2000-12-21
申请人： Wanrong Lin , Dennis Bushmitch
发明人： Wanrong Lin , Dennis Bushmitch
IPC分类号： H04N712
CPC分类号： H04N19/18 , H04N19/105 , H04N19/122 , H04N19/126 , H04N19/14 , H04N19/149 , H04N19/15 , H04N19/176 , H04N19/186 , H04N19/60
摘要： A simple and efficient scheme is used to predict the number of bits needed to block of discrete cosine transform (DCT) coefficients with variable length coding (VLC). The scheme defines an easily computable parameter that has a strong correlation with the number of bits needed to encode the DCT data. Then a second order polynomial is developed to approximate the correlation and is used to predict the number of VLC bits that will be produced if a corresponding quantization matrix is used. The approach can be used to streamline the encoding/transcoding process for DV, and the result on that is presented. A further feature is the ability to present multiple results for multiple quantization matrixes.

58. 发明授权

US06625220B1 Image capture and transmission system 失效
标题翻译：图像捕获和传输系统
公开(公告)号：US06625220B1
公开(公告)日：2003-09-23
申请号：US09315062
申请日：1999-05-20
申请人： Kengo Tsuzuki , Toshiaki Shinohara
发明人： Kengo Tsuzuki , Toshiaki Shinohara
IPC分类号： H04N712
CPC分类号： H04L12/40117 , H04N21/4223 , H04N21/4305 , H04N21/43632 , H04N21/44008 , H04N21/4622
摘要： An image capture and transmission system includes first and second imaging devices. A timing signal generator produces a timing signal. A common drive circuit operates for driving the first and second imaging devices at equal timings determined by the timing signal. A first signal processor operates for converting an output signal of the first imaging device into first digital video data. A second signal processor operates for converting an output signal of the second imaging device into second digital video data. The first digital video data and the second digital video data are processed into a stream of packets. The packet stream is transmitted to, for example, a network.
摘要翻译：图像捕获和传输系统包括第一和第二成像装置。定时信号发生器产生定时信号。公共驱动电路用于在由定时信号确定的相等定时驱动第一和第二成像装置。第一信号处理器用于将第一成像装置的输出信号转换为第一数字视频数据。第二信号处理器用于将第二成像装置的输出信号转换为第二数字视频数据。第一数字视频数据和第二数字视频数据被处理成分组流。分组流被发送到例如网络。

59. 发明授权

US06625218B1 Audio/video separator including a user data start address register 有权
标题翻译：包括用户数据起始地址寄存器的音频/视频分离器
公开(公告)号：US06625218B1
公开(公告)日：2003-09-23
申请号：US09189147
申请日：1998-11-10
申请人： Chiho Iganami
发明人： Chiho Iganami
IPC分类号： H04N712
CPC分类号： H04N21/42692 , H04N21/23614 , H04N21/2368 , H04N21/42615 , H04N21/434 , H04N21/4341 , H04N21/4348
摘要： An MPEG decoder which prevents user data, which is in video code data of MPEG-compressed code data, from being overwritten by the next code data before a CPU reads the user data has an audio/video separator 3 and a memory. The audio/video separator 3 has a start code detector 11 which, in turn, has a start code start address register 12 and a start code register 13. When the MPEG decoder receives compressed code data, the start code detector 11 searches the compressed code data for a start code specified by the start code register 13 and stores the start address of the start code into the start code start address register 12.
摘要翻译：在CPU读取用户数据之前，防止在MPEG压缩代码数据的视频代码数据中的用户数据被下一个代码数据覆盖的MPEG解码器具有音频/视频分离器3和存储器。音频/视频分离器3具有起始码检测器11，起始码检测器11又具有起始码开始地址寄存器12和起始码寄存器13.当MPEG解码器接收压缩码数据时，起始码检测器11搜索压缩码用于由起始码寄存器13指定的起始码的数据，并将起始码的开始地址存储到起始码开始地址寄存器12中。

60. 发明授权

US06621866B1 Method for inserting a visual element into an MPEG bit stream 有权
标题翻译：将视觉元素插入到MPEG位流中的方法
公开(公告)号：US06621866B1
公开(公告)日：2003-09-16
申请号：US09494030
申请日：2000-01-28
申请人： Dinei Afonso Ferreira Florencio , Stuart Jay Golin , Jungwoo Lee
发明人： Dinei Afonso Ferreira Florencio , Stuart Jay Golin , Jungwoo Lee
IPC分类号： H04N712
CPC分类号： H04N21/23892 , H04N19/115 , H04N19/126 , H04N19/15 , H04N19/174 , H04N19/176 , H04N19/187 , H04N19/40 , H04N19/467 , H04N19/61 , H04N21/8358
摘要： A transcoding method for inserting a visual element into an encoded bit stream with minimal decoding of the encoded bit stream. The transcoding method includes the steps of receiving an encoded bit stream containing a picture, partially decoding a copy of the bit stream, determining if a segment of the picture in the bit stream is affected by the insertion of the visual element, re-encoding the segment if the segment is affected by the insertion of the visual element, and outputting the re-encoded bit stream. The encoded and re-encoded bit streams may be MPEG-encoded bit streams. The re-encoded bit stream may be output using a bit rate control process that randomly selects an initial processing point within the re-encoded bit stream, requantizes the re-encoded bit stream using a modified quantization table, and/or utilizes a slice-level stopping criteria for selectively starting or ending bit rate control.
摘要翻译：一种用于将可视元素插入编码比特流中的代码转换方法，其中编码比特流的解码最小化。代码转换方法包括以下步骤：接收包含图像的编码比特流，部分地解码比特流的副本，确定比特流中的图像的片段是否受到视觉元素的插入的影响，重新编码如果该段受到可视元素的插入的影响，并且输出重新编码的位流，则该段被分段。编码和重新编码的比特流可以是MPEG编码比特流。可以使用随机选择重编码比特流内的初始处理点的比特率控制处理来输出重新编码的比特流，并使用修改的量化表重新编码重新编码的比特流，和/ 选择性地启动或结束比特率控制的级别停止标准。

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