专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06219043B1 Method and system to replace sections of an encoded video bitstream 有权
标题翻译：替代编码视频比特流的部分的方法和系统
公开(公告)号：US06219043B1
公开(公告)日：2001-04-17
申请号：US09504780
申请日：2000-02-15
申请人： Jay Yogeshwar , Sheau-Bao Ng , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
发明人： Jay Yogeshwar , Sheau-Bao Ng , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
IPC分类号： G06F300
CPC分类号： G11B27/034 , G11B27/036 , G11B27/329 , G11B27/34 , G11B2220/2545 , G11B2220/2562
摘要： A method and system in which a section of a previously encoded digital bit stream is replaced with another section of encoded video. In order to remove a section of encoded video, it is necessary to determine the beginning and ending points of the encoded video in the digitally encoded bit stream. The addresses of the beginning and ending points of the encoded data cannot be simply looked up but are calculated by summing the bits consumed by each picture, the number of bits of the sequence header of each picture, the number of bits of each Group of Pictures (GOP) header, and all stuff bits. In order to encode the video which is to be inserted in place of the removed video, a process is performed which prevents decoding artifacts from appearing. This is accomplished by determining the last P-picture before the edit point and using it as a reference frame for frames after the edit point. Additionally, a short period of the original video encoded using its original quantizer values is included at the end of the video to be substituted. Alternatively, the encoder may be run so that an earlier encoded reference picture is not used. However, this requires extra bits to maintain picture quality because initial bidirectional frames of the substitute video will use only one reference frame instead of two.
摘要翻译：一种方法和系统，其中先前编码的数字比特流的一部分被替换为编码视频的另一部分。为了去除编码视频的一部分，需要确定数字编码比特流中编码视频的开始点和结束点。编码数据的开始点和结束点的地址不能简单地查找，而是通过对每个图像消耗的比特，每个图像的序列标题的比特数，每个图像组的比特数进行求和来计算（GOP）头，以及所有填充位。为了对要插入的视频进行编码以取代所删除的视频，执行防止解码伪影出现的处理。这是通过在编辑点之前确定最后一个P图像并将其用作编辑点之后的帧的参考帧来实现的。此外，使用其原始量化器值编码的原始视频的短周期被包括在要被替代的视频的结尾处。或者，可以运行编码器，使得不使用较早编码的参考图像。然而，这需要额外的比特来保持图像质量，因为替代视频的初始双向帧将仅使用一个参考帧而不是两个参考帧。

2. 发明授权

US5838874A Audiovisual encoding system with a reduced number of audio encoders 失效
标题翻译：具有减少数量的音频编码器的视听编码系统
公开(公告)号：US5838874A
公开(公告)日：1998-11-17
申请号：US467991
申请日：1995-06-06
申请人： Sheau-Bao Ng , Mikhail Tsinberg , Masaru Sakurai , David Lehmann , Jay Yogeshwar , Faramarz Azadegan , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
发明人： Sheau-Bao Ng , Mikhail Tsinberg , Masaru Sakurai , David Lehmann , Jay Yogeshwar , Faramarz Azadegan , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
IPC分类号： H04N5/92 , G06T9/00 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/91 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , H04N5/76 , H04N5/928
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/34 , G11B27/36 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/503 , H04N19/60 , H04N19/61 , H04N5/9262 , H04N7/52 , H04N9/8042 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , G11B27/3027 , G11B27/329 , H04N19/146 , H04N19/30
摘要： An audiovisual encoding system using a multipass video encoder and a plurality of one-pass audio encoders. The number of audio encoders used by the system is equal to the number of audio tracks to be encoded divided by the number of passes required for the video encoding rounded up to the nearest integer, if necessary. The system allows the video encoder and audio encoders to be used at the same time so that the encoding of the video is completed at the same time as the encoding of all audio tracks is completed, using the minimum number of audio encoders.
摘要翻译：一种使用多通道视频编码器和多个单声道音频编码器的视听编码系统。如果需要，系统使用的音频编码器的数量等于要编码的音轨的数量除以被舍入到最接近的整数的视频编码所需的传递次数。该系统允许同时使用视频编码器和音频编码器，使得在使用最少数量的音频编码器完成所有音轨的编码的同时完成视频的编码。

3. 发明授权

US06026232A Method and system to replace sections of an encoded video bitstream 失效
标题翻译：替代编码视频比特流的部分的方法和系统
公开(公告)号：US06026232A
公开(公告)日：2000-02-15
申请号：US502012
申请日：1995-07-13
申请人： Jay Yogeshwar , Sheau-Bao Ng , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
发明人： Jay Yogeshwar , Sheau-Bao Ng , Teiichi Ichikawa , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
IPC分类号： H04N5/765 , G11B20/10 , G11B20/12 , G11B27/02 , G11B27/034 , G11B27/036 , G11B27/32 , G11B27/34 , G11B27/36 , H03M7/30 , H04N5/781 , H04N5/84 , H04N5/91 , H04N5/92 , H04N5/93 , H04N7/32 , G06F17/30
CPC分类号： G11B27/034 , G11B27/329 , G11B27/34 , G11B2220/2545 , G11B2220/2562 , G11B27/036
摘要： A method and system in which a section of a previously encoded digital bit stream is replaced with another section of encoded video. In order to remove a section of encoded video, it is necessary to determine the beginning and ending points of the encoded video in the digitally encoded bit stream. The addresses of the beginning and ending points of the encoded data cannot be simply looked up but are calculated by summing the bits consumed by each picture, the number of bits of the sequence header of each picture, the number of bits of each Group of Pictures (GOP) header, and all stuff bits. In order to encode the video which is to be inserted in place of the removed video, a process is performed which prevents decoding artifacts from appearing. This is accomplished by determining the last P-picture before the edit point and using it as a reference frame for frames after the edit point. Additionally, a short period of the original video encoded using its original quantizer values is included at the end of the video to be substituted. Alternatively, the encoder may be run so that an earlier encoded reference picture is not used. However, this requires extra bits to maintain picture quality because initial bidirectional frames of the substitute video will use only one reference frame instead of two.
摘要翻译：一种方法和系统，其中先前编码的数字比特流的一部分被替换为编码视频的另一部分。为了去除编码视频的一部分，需要确定数字编码比特流中编码视频的开始点和结束点。编码数据的开始点和结束点的地址不能简单地查找，而是通过对每个图像消耗的比特，每个图像的序列标题的比特数，每个图像组的比特数进行求和来计算（GOP）头，以及所有填充位。为了对要插入的视频进行编码以取代所删除的视频，执行防止解码伪影出现的处理。这是通过在编辑点之前确定最后一个P图像并将其用作编辑点之后的帧的参考帧来实现的。此外，使用其原始量化器值编码的原始视频的短周期被包括在要被替代的视频的结尾处。或者，可以运行编码器，使得不使用较早编码的参考图像。然而，这需要额外的比特来保持图像质量，因为替代视频的初始双向帧将仅使用一个参考帧而不是两个参考帧。

4. 发明授权

US5819004A Method and system for a user to manually alter the quality of previously encoded video frames 失效
标题翻译：用于用户手动改变先前编码的视频帧的质量的方法和系统
公开(公告)号：US5819004A
公开(公告)日：1998-10-06
申请号：US466391
申请日：1995-06-06
申请人： Faramarz Azadegan , Jay Yogeshwar , Sheau-Bao Ng , David Lehmann , Mikhail Tsinberg , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
发明人： Faramarz Azadegan , Jay Yogeshwar , Sheau-Bao Ng , David Lehmann , Mikhail Tsinberg , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
IPC分类号： H04N5/92 , G06T9/00 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/91 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/32 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , H04N5/76
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/34 , G11B27/36 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/503 , H04N19/60 , H04N19/61 , H04N5/9262 , H04N7/52 , H04N9/8042 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , G11B27/3027 , G11B27/329 , H04N19/146 , H04N19/30
摘要： A method and system in which a user manually changes the quality of portions of video frames after the frames have been previously encoded. Regions of one or more frames of video are selected to have an increased quality, a decreased quality, or a quality which should not be altered. After the regions are defined by a user, the frame of video is digitally re-encoded and inserted into the digitally encoded data stream in place of the previously encoded data. In order to easily remove a previously encoded frame from the data steam and replace it with a newly encoded frame having regions of quality defined by the user, it is preferable to have the newly encoded frame consume the same number of bits as the previously encoded frame. Accordingly, if the user desires a region of a frame to have an increased quality, the extra bits necessary to provide the increased quality must be taken from other areas of the frame. This is accomplished by an automatic process which is transparent to the user. Additionally, if the user wants to change the quality of an object for a series of video frames, the user can mark a region in a first frame and a corresponding region in a last frame and the system will automatically adjust the quality of the region as the region moves through the series of video frames.
摘要翻译：一种方法和系统，其中用户在预先编码帧之后手动地改变视频帧的部分的质量。选择一个或多个视频帧的区域具有增加的质量，降低的质量或不应该改变的质量。在由用户定义区域之后，视频帧被数字地重新编码并插入数字编码的数据流中，代替先前编码的数据。为了容易地从数据流中去除先前编码的帧，并用具有由用户定义的质量区域的新编码帧替换，优选地，新编码的帧消耗与先前编码的帧相同的比特数。因此，如果用户期望帧的区域具有增加的质量，则必须从帧的其他区域获取提供增加的质量所需的额外比特。这是通过对用户透明的自动过程来实现的。此外，如果用户想要改变一系列视频帧的对象的质量，则用户可以标记最后一帧中的第一帧和对应区域中的区域，并且系统将自动地将区域的质量调整为该区域移动通过一系列视频帧。

5. 发明授权

US5684714A Method and system for a user to manually alter the quality of a previously encoded video sequence 失效
标题翻译：用于用户手动改变先前编码的视频序列的质量的方法和系统
公开(公告)号：US5684714A
公开(公告)日：1997-11-04
申请号：US469370
申请日：1995-06-06
申请人： Jay Yogeshwar , Faramarz Azadegan , Sheau-Bao Ng , David Lehmann , Mikhail Tsinberg , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
发明人： Jay Yogeshwar , Faramarz Azadegan , Sheau-Bao Ng , David Lehmann , Mikhail Tsinberg , Hiroaki Unno , Hideki Mimura , Tetsuya Kitamura , Christopher J. Cookson , Greg B. Thagard , Andrew Drusin Rosen
IPC分类号： H04N5/92 , G06T9/00 , G11B20/10 , G11B20/12 , G11B27/00 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , H04N5/76
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/34 , G11B27/36 , H04N19/115 , H04N19/124 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/503 , H04N19/60 , H04N19/61 , H04N5/9262 , H04N7/52 , H04N9/8042 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , G11B27/3027 , G11B27/329 , H04N19/146 , H04N19/30
摘要： A method and system in which a user manually changes the quality of specific time periods of encoded video. After the automatic encoding of video into a compressed digital format, a person editing the encoded video reviews the quality of the video and manually indicates that the quality of specific time periods of the video is to be altered. As the digital storage medium such as an optical disc which stores the encoded video has a finite storage capacity, the total number of bits for the encoded video and the quality of the video is limited. Consequently, in order to increase the quality for one time period, bits must be taken from other time periods. After the editor assigns the qualities to different time periods, a percentage of bits is removed from the time sequences and placed into a bit pool. The new number of bits for the various time periods are calculated using an exponential function and the bits in the bit pool are proportionally distributed to the video frames. The frames must then be checked and possibly adjusted to assure that underflow of the video buffer will not occur. After the underflow checking procedure, the video is re-encoded with an adjusted quantization in accordance with a quantizer model which will result in a picture having the calculated number of bits and a quality in accordance with the user's selection.
摘要翻译：一种方法和系统，其中用户手动地改变编码视频的特定时间段的质量。在将视频自动编码成压缩数字格式之后，编辑视频的人回顾视频的质量，并手动指示视频的特定时间段的质量将被改变。由于诸如存储编码视频的光盘的数字存储介质具有有限的存储容量，所以编码视频的总位数和视频的质量受到限制。因此，为了提高一个时间段的质量，必须从其他时间段获取位。在编辑器将质量分配给不同的时间段后，从时间序列中删除比特的百分比并将其放入位池。使用指数函数计算各个时间段的新的比特数，并且比特池中的比特按比例分配给视频帧。然后必须检查并可能调整帧，以确保视频缓冲区的下溢不会发生。在下溢检查过程之后，根据量化器模型，利用经调整的量化重新编码视频，该量化器模型将导致具有根据用户选择的计算的位数和质量的图像。

6. 发明授权

US08135263B2 Methods and apparatus for indexing and archiving encoded audio/video data 有权
标题翻译：索引和归档编码音频/视频数据的方法和设备
公开(公告)号：US08135263B2
公开(公告)日：2012-03-13
申请号：US11517825
申请日：2006-09-08
申请人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie, III
发明人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie, III
IPC分类号： H04N5/92 , H04N5/917
CPC分类号： G11B27/10 , G06F17/30858 , H04N5/76 , H04N9/7921 , H04N9/8042 , H04N9/8047 , H04N9/8205 , H04N9/8227 , H04N9/8233
摘要： Archival storage and retrieval of audio/video information is described. Audio and/or video information is digitized, compressed and stored in an intermediate archive format (IAF), which preserves the content at a high-enough quality for subsequent retrieval and conversion into various formats required at the time of use or distribution. A single capture operation is performed with ancillary metadata being added to facilitate subsequent searching, indexing and format conversion. Captured data content is catalogued and indexed at or subsequent to the creation of an IAF file that includes the archived information. The IAF includes a family of audio-video digital encoding formats based on public standards. The encoding format used in any particular application is determined at encoding time from information provided by the archive system user. At encoding, the particular encoding scheme is selected to optimize a tradeoff between storage constraints and end use quality requirements.
摘要翻译：描述音频/视频信息的档案存储和检索。音频和/或视频信息被数字化，压缩并以中间归档格式（IAF）存储，其以足够高的质量保留内容以用于随后的检索和转换成使用或分发时所需的各种格式。执行单个捕获操作，其中添加辅助元数据以便于随后的搜索，索引和格式转换。捕获的数据内容在创建包含归档信息的IAF文件或之后进行编目和索引。 IAF包括基于公共标准的音视频数字编码格式系列。根据归档系统用户提供的信息，在编码时确定在任何特定应用中使用的编码格式。在编码时，选择特定编码方案以优化存储约束和最终使用质量要求之间的权衡。

7. 发明授权

US06222886B1 Compression based reduced memory video decoder 失效
标题翻译：基于压缩的缩小内存视频解码器
公开(公告)号：US06222886B1
公开(公告)日：2001-04-24
申请号：US08669218
申请日：1996-06-24
申请人： Jay Yogeshwar
发明人： Jay Yogeshwar
IPC分类号： H04N712
CPC分类号： H04N19/40 , H04N19/17 , H04N19/423 , H04N19/428 , H04N19/61
摘要： A compressed video decoder receives a stream of compressed video data in a channel buffer, and decompresses it. A portion of the decompressed video data is recompressed as intraframe data to serve as an anchor frame. The intraframe data is motion compensated, and then a reference picture is selected. The reference frame data is decompressed. Next, a region of interest is selected and stored in display memory for the decompressed form. The recompression of data to be used as an anchor frame can be done in a substantially lossless manner by using DCT with the same quantization matrix, quantizer scale, and field/frame coding type.
摘要翻译：压缩视频解码器在通道缓冲器中接收压缩视频数据流，并将其解压缩。解压缩的视频数据的一部分被重新压缩为帧内数据以用作锚帧。帧内数据被运动补偿，然后选择参考图像。参考帧数据被解压缩。接下来，选择感兴趣区域并将其存储在用于解压缩形式的显示存储器中。可以通过使用具有相同量化矩阵，量化器尺度和场/帧编码类型的DCT以基本上无损的方式来进行用作锚帧的数据的再压缩。

8. 发明授权

US08634705B2 Methods and apparatus for indexing and archiving encoded audio/video data 有权
标题翻译：索引和归档编码音频/视频数据的方法和设备
公开(公告)号：US08634705B2
公开(公告)日：2014-01-21
申请号：US11927389
申请日：2007-10-29
申请人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie, III
发明人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie, III
IPC分类号： H04N5/91 , H04N5/917 , H04N5/76
CPC分类号： G11B27/10 , G06F17/30858 , H04N5/76 , H04N9/7921 , H04N9/8042 , H04N9/8047 , H04N9/8205 , H04N9/8227 , H04N9/8233
摘要： Archival storage and retrieval of audio/video information is described. Audio and/or video information is digitized, compressed and stored in an intermediate archive format (IAF), which preserves the content at a high-enough quality for subsequent retrieval and conversion into various formats required at the time of use or distribution. A single capture operation is performed with ancillary metadata being added to facilitate subsequent searching, indexing and format conversion. Captured data content is catalogued and indexed at or subsequent to the creation of an IAF file that includes the archived information. The IAF includes a family of audio-video digital encoding formats based on public standards. The encoding format used in any particular application is determined at encoding time from information provided by the archive system user. At encoding, the particular encoding scheme is selected to optimize a tradeoff between storage constraints and end use quality requirements.
摘要翻译：描述音频/视频信息的档案存储和检索。音频和/或视频信息被数字化，压缩并以中间归档格式（IAF）存储，其以足够高的质量保留内容以用于随后的检索和转换成使用或分发时所需的各种格式。执行单个捕获操作，其中添加辅助元数据以便于随后的搜索，索引和格式转换。捕获的数据内容在创建包含归档信息的IAF文件或之后进行编目和索引。 IAF包括基于公共标准的音视频数字编码格式系列。根据归档系统用户提供的信息，在编码时确定在任何特定应用中使用的编码格式。在编码时，选择特定编码方案以优化存储约束和最终使用质量要求之间的权衡。

9. 发明申请

US20080262996A1 Methods and apparatus for indexing and archiving encoded audio/video data 有权
标题翻译：索引和归档编码音频/视频数据的方法和设备
公开(公告)号：US20080262996A1
公开(公告)日：2008-10-23
申请号：US11927389
申请日：2007-10-29
申请人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie
发明人： Jay Yogeshwar , Stephen A. Martucci , Bobby R. Gupta , Melanie R. Fendt , Frederick M. Venzie
IPC分类号： G06F17/30
CPC分类号： G11B27/10 , G06F17/30858 , H04N5/76 , H04N9/7921 , H04N9/8042 , H04N9/8047 , H04N9/8205 , H04N9/8227 , H04N9/8233
摘要： Archival storage and retrieval of audio/video information is described. Audio and/or video information is digitized, compressed and stored in an intermediate archive format (IAF), which preserves the content at a high-enough quality for subsequent retrieval and conversion into various formats required at the time of use or distribution. A single capture operation is performed with ancillary metadata being added to facilitate subsequent searching, indexing and format conversion. Captured data content is catalogued and indexed at or subsequent to the creation of an IAF file that includes the archived information. The IAF includes a family of audio-video digital encoding formats based on public standards. The encoding format used in any particular application is determined at encoding time from information provided by the archive system user. At encoding, the particular encoding scheme is selected to optimize a tradeoff between storage constraints and end use quality requirements.
摘要翻译：描述音频/视频信息的档案存储和检索。音频和/或视频信息被数字化，压缩并以中间归档格式（IAF）存储，其以足够高的质量保留内容以用于随后的检索和转换成使用或分发时所需的各种格式。执行单个捕获操作，其中添加辅助元数据以便于随后的搜索，索引和格式转换。捕获的数据内容在创建包含归档信息的IAF文件或之后进行编目和索引。 IAF包括基于公共标准的音视频数字编码格式系列。根据归档系统用户提供的信息，在编码时确定在任何特定应用中使用的编码格式。在编码时，选择特定编码方案以优化存储约束和最终使用质量要求之间的权衡。

10. 发明申请

US20050232497A1 High-fidelity transcoding 审中-公开
标题翻译：高保真转码
公开(公告)号：US20050232497A1
公开(公告)日：2005-10-20
申请号：US10826974
申请日：2004-04-15
申请人： Jay Yogeshwar , Kunal Mukerjee , Robert Green
发明人： Jay Yogeshwar , Kunal Mukerjee , Robert Green
IPC分类号： H04N7/32 , H03M7/36 , H04N7/26 , G06K9/36 , H04N7/12
CPC分类号： H04N19/40 , H04N19/103 , H04N19/122 , H04N19/126 , H04N19/14 , H04N19/15 , H04N19/152 , H04N19/157 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/527 , H04N19/56
摘要： High-fidelity transcoding techniques are described. For example, a video transcoder obtains re-coding data set elements for source format compressed video and uses the elements for coding decisions and/or equivalent parameters when compressing the video in a target format. This allows syntax elements and coding decisions to be maintained across the two formats, including picture types, intra/inter macroblock coding types, field/frame coding decisions, and/or quantization levels. This helps the transcoder match quality in the compressed video between the source and target formats, reducing transcoding losses. At the same time, the transcoder gives the target format encoder the freedom to exploit additional compression opportunities to reduce overall bitrate. The transcoder may apply proportional rate control so as to produce output at a constant or relatively constant bitrate.
摘要翻译：描述了高保真转码技术。例如，视频代码转换器获得用于源格式压缩视频的重新编码数据集元素，并且在以目标格式压缩视频时使用用于编码决定的元素和/或等效参数。这允许在两种格式之间保持语法元素和编码决定，包括图像类型，帧内/帧间宏块编码类型，场/帧编码决定和/或量化级别。这有助于代码转换器在源和目标格式之间匹配压缩视频中的质量，从而减少转码损失。同时，代码转换器使目标格式编码器可以利用额外的压缩机会来降低整体比特率。代码转换器可以应用比例率控制，以便以恒定或相对恒定的比特率产生输出。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式