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1. 发明授权

US08938000B2 Transcoding system using encoding history information 有权
公开(公告)号：US08938000B2
公开(公告)日：2015-01-20
申请号：US11879406
申请日：2007-07-17
申请人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
发明人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
IPC分类号： H04N7/50 , H04N19/115 , H04N19/426 , H04N19/61 , H04N19/152 , H04N19/107 , H04N19/40
CPC分类号： H04N19/0006 , H04N19/10 , H04N19/107 , H04N19/115 , H04N19/152 , H04N19/40 , H04N19/428 , H04N19/61
摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

2. 发明申请

US20110080943A1 VIDEO DATA COMPRESSION APPARATUS AND METHOD OF SAME 审中-公开
标题翻译：视频数据压缩装置及其方法
公开(公告)号：US20110080943A1
公开(公告)日：2011-04-07
申请号：US12967551
申请日：2010-12-14
申请人： Kanji MIHARA , Takuya Kitamura , Takao Suzuki
发明人： Kanji MIHARA , Takuya Kitamura , Takao Suzuki
IPC分类号： H04N7/26
CPC分类号： H04N19/198 , H04N19/114 , H04N19/115 , H04N19/124 , H04N19/126 , H04N19/14 , H04N19/142 , H04N19/146 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/194 , H04N19/196 , H04N19/61
摘要： A video data compression apparatus with which compressed video data of suitable amounts of data can be produced and the time required for processing is short. The apparatus approximates a real difficulty data Dj indicating the difficulty of the pattern of each picture by the ME residual, flatness, and intra AC and further calculates the target amount of data Tj of the compressed video data from the approximated real difficulty data Dj. An encoder performs compression and coding so that the amount of data of the compressed video data becomes substantially the target amount of data Tj.
摘要翻译：可以产生适当数据量的压缩视频数据并且处理所需时间短的视频数据压缩装置。该装置近似实际困难数据Dj，其表示ME残差，平坦度和AC内的每个图像的图案的难度，并进一步根据近似的实际困难数据Dj计算压缩视频数据的目标数据量Tj。编码器执行压缩和编码，使得压缩视频数据的数据量基本上变成目标数据量Tj。

3. 发明授权

US07460597B2 Encoding apparatus and method 失效
标题翻译：编码装置及方法
公开(公告)号：US07460597B2
公开(公告)日：2008-12-02
申请号：US11077738
申请日：2005-03-10
申请人： Kanji Mihara
发明人： Kanji Mihara
IPC分类号： H04N7/12 , G06K9/36
CPC分类号： H04N19/126 , H04N19/61
摘要： An encoding apparatus and method prevents image deterioration generated by repeatedly performing encoding and decoding by using a quantization matrix for quantization which is different from a quantization matrix for inverse quantization. In the encoding apparatus, a matrix selector selects a first quantization matrix in accordance with the complexity of an encoded picture pattern, and supplies a quantizer with information on the selected first quantization matrix. A matrix unit rewrites, by information on a second quantization matrix, the information described in an encoded stream output from a variable length code unit so that a quantization matrix to be used for inverse quantization is a second quantization matrix different from the first quantization matrix.
摘要翻译：一种编码装置和方法，通过使用与用于逆量化的量化矩阵不同的量化用量化矩阵来防止重复进行编码和解码而产生的图像劣化。在编码装置中，矩阵选择器根据编码图案的复杂度来选择第一量化矩阵，并向量化器提供关于所选择的第一量化矩阵的信息。矩阵单元通过关于第二量化矩阵的信息，以可变长度代码单元输出的编码流中描述的信息重写，使得用于逆量化的量化矩阵是与第一量化矩阵不同的第二量化矩阵。

4. 发明申请

US20080013626A1 Transcoding system using encoding history information 审中-公开
公开(公告)号：US20080013626A1
公开(公告)日：2008-01-17
申请号：US11879406
申请日：2007-07-17
申请人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
发明人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
IPC分类号： H04B1/66
CPC分类号： H04N19/0006 , H04N19/10 , H04N19/107 , H04N19/115 , H04N19/152 , H04N19/40 , H04N19/428 , H04N19/61
摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

5. 发明申请

US20080013625A1 Transcoding system using encoding history information 失效
公开(公告)号：US20080013625A1
公开(公告)日：2008-01-17
申请号：US11879400
申请日：2007-07-17
申请人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
发明人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
IPC分类号： H04B1/66
CPC分类号： H04N19/0006 , H04N19/10 , H04N19/107 , H04N19/115 , H04N19/152 , H04N19/40 , H04N19/428 , H04N19/61
摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

6. 发明授权

US06493384B1 Video data compression apparatus and method of same 有权
标题翻译：视频数据压缩装置及其方法
公开(公告)号：US06493384B1
公开(公告)日：2002-12-10
申请号：US09715393
申请日：2000-11-17
申请人： Kanji Mihara
发明人： Kanji Mihara
IPC分类号： H04N712
CPC分类号： H04N19/40 , H04N19/114 , H04N19/177 , H04N19/61
摘要： When repeatedly performing compression and encoding of video data, automatically detecting a previous picture type at an encoder side and performing the compression and encoding by matching GOP phases. A motion compensation unit 240 to a DCT unit 244 perform motion compensation, DCT, etc. on input video data to generate DCT coefficients. A back search unit 248 detects whether or not there is a relative minimum in the sum of remainders of the results of division by the quantization steps of the DCT coefficients, judges that the picture having the relative minimum has been compressed and encoded to an intra-picture in the previous compression and encoding, and judges the structure of the GOPs (a number N of pictures and an interval M of P pictures) at the previous compression and encoding. A picture type control unit 250 controls a picture rearrangement unit 200 based on the judged GOP structure to make it rearrange pictures of the input video data to an order by which a compression and encoding unit 20 can perform compression and encoding with the same GOP phase as that of the previous time.
摘要翻译：当重复执行视频数据的压缩和编码时，在编码器侧自动检测先前的图像类型，并通过匹配GOP相位进行压缩和编码。运动补偿单元240对DCT单元244执行运动补偿，DCT等输入视频数据以产生DCT系数。反向搜索单元248通过DCT系数的量化步长来检测除法结果的余数之和是否相对最小，判断具有相对最小值的图像已被压缩并被编码为帧内编码，在先前的压缩和编码中判断GOP的结构（图像的数量N和P图像的间隔M）。图像类型控制单元250基于所判断的GOP结构来控制图像重新排列单元200，以使其将输入视频数据的重新排列的图像按压缩和编码单元20能够以与GOP相同的GOP相位执行压缩和编码的顺序以前的时间。

7. 发明授权

US06337879B1 Video data compression apparatus and method of same 失效
公开(公告)号：US06337879B1
公开(公告)日：2002-01-08
申请号：US08909448
申请日：1997-08-11
申请人： Kanji Mihara , Takuya Kitamura , Takao Suzuki
发明人： Kanji Mihara , Takuya Kitamura , Takao Suzuki
IPC分类号： H04B166
CPC分类号： H04N19/198 , H04N19/114 , H04N19/115 , H04N19/124 , H04N19/126 , H04N19/14 , H04N19/142 , H04N19/146 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/194 , H04N19/196 , H04N19/61
摘要： A video data compression apparatus with which compressed video data of suitable amounts of data can be produced and in addition the time required for processing is short. An encoder control unit performs a preprocessing for compression and coding and, at the same time, produces a flatness and an intra AC as parameters indicating the difficulty of the pattern of pictures to be compressed to I pictures. A motion detector calculates a predictive error amount (ME residual) of the motion prediction. An FIFO memory delays each picture of the input video data. A host computer approximates a real difficulty data Dj indicating the difficulty of the pattern of each picture by the ME residual, flatness, and intra AC and further calculates the target amount of data Tj of the compressed video data from the approximated real difficulty data Dj. The encoder performs the compression and coding so that the amount of data of the compressed video data becomes substantially the target amount of data Tj.

8. 发明授权

US06229849B1 Coding device and method 有权
标题翻译：编码装置和方法
公开(公告)号：US06229849B1
公开(公告)日：2001-05-08
申请号：US09368608
申请日：1999-08-05
申请人： Kanji Mihara
发明人： Kanji Mihara
IPC分类号： H04N726
CPC分类号： H04N21/23655 , H04N19/124 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/60 , H04N19/61 , H04N21/2401
摘要： An upper limit of a usable range of a VBV buffer is determined from a preset delay time of the VBV buffer and a designated bit rate. A target bit quantity of a picture (i) and a data occupancy quantity of the VBV at the time when a picture (j+1) is coded are calculated, and the target bit quantity T(j) for coding the picture (j) is corrected so that the data occupancy quantity of the VBV of the picture (j+1) constantly falls within the limited range. By this, even when a low coding bit rate is set, the delay due to the VBV buffer of a predetermined delay time or longer does not reach a prescribed delay time or longer. Thus, an MPEG encoder suitable for a live broadcast in which the problem of delay time is not desired can be realized.
摘要翻译：从VBV缓冲器的预设延迟时间和指定的比特率确定VBV缓冲器的可用范围的上限。计算图像（i）的目标比特量和编码图像（j + 1）时的VBV的数据占有量，并且对图像（j）进行编码的目标比特量T（j）被校正为使得图像（j + 1）的VBV的数据占有量始终处于限制范围内。由此，即使设定了低编码比特率，由于预定延迟时间以上的VBV缓冲器引起的延迟也不达到规定的延迟时间或更长时间。因此，可以实现适合于不需要延迟时间问题的实时广播的MPEG编码器。

9. 发明授权

US5506716A Method, circuit, and apparatus for mitigating effects of wavelength-dependent atmospheric transmission characteristics on atmospheric optical telecommunication 失效
标题翻译：用于减轻波长依赖的大气传播特性对大气光通信的影响的方法，电路和装置
公开(公告)号：US5506716A
公开(公告)日：1996-04-09
申请号：US361644
申请日：1994-12-22
申请人： Kanji Mihara , Akira Hirashima , Takashi Otobe , Yujiro Ito
发明人： Kanji Mihara , Akira Hirashima , Takashi Otobe , Yujiro Ito
IPC分类号： H04B10/572 , H04B10/07 , H04B10/11 , H04B10/112 , H04B10/2507 , H04B10/293 , H04B10/564 , H04B10/00
CPC分类号： H04B10/1125
摘要： A method, circuit, and apparatus for mitigating effects of wavelength-dependent atmospheric transmission characteristics on an atmospheric optical telecommunication system. The system comprises two atmospheric optical telecommunication units communicating with one another using light propagated through the atmosphere. Each of the atmospheric telecommunication units includes an optical transmitter having a laser generating a transmitted light beam for reception by the other, and an optical receiver. The optical receiver generates an electrical signal in response to a received light beam received from the other of the atmospheric optical telecommunication units. In the method, an increase in noise above a normal noise level is detected in the electrical signal, and a flag signal is generated in response. The increase in noise is due to the received light beam having a wavelength at which the atmosphere has a wavelength-dependent transmission characteristic. In response to the flag signal, the wavelength of the transmitted light beam is changed to a wavelength at which the transmission characteristic of the atmosphere is less wavelength-dependent.
摘要翻译：一种用于减轻大气光通信系统上波长依赖大气传播特性的影响的方法，电路和装置。该系统包括使用通过大气传播的光彼此通信的两个大气光通信单元。每个大气通信单元包括具有产生用于由另一个接收的透射光束的激光的光发射器和光接收器。光接收器响应从另一个大气光通信单元接收的接收光束产生电信号。在该方法中，在电信号中检测到高于正常噪声电平的噪声增加，并且响应地产生标志信号。噪声的增加是由于接收的光束具有大气具有波长相关传输特性的波长。响应于标志信号，透射光束的波长被改变为大气的透射特性与波长相关的波长。

10. 发明授权

US08934536B2 Transcoding system using encoding history information 有权
公开(公告)号：US08934536B2
公开(公告)日：2015-01-13
申请号：US11879245
申请日：2007-07-17
申请人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
发明人： Katsumi Tahara , Yoshihiro Murakami , Takuya Kitamura , Kanji Mihara
IPC分类号： H04B1/66 , H04N19/115 , H04N19/426 , H04N19/61 , H04N19/152 , H04N19/107 , H04N19/40
CPC分类号： H04N19/0006 , H04N19/10 , H04N19/107 , H04N19/115 , H04N19/152 , H04N19/40 , H04N19/428 , H04N19/61
摘要： The present invention provides a transcoder having a MPEG decoder and a MPEG encoder, for changing a GOP structure and the bit rate of an encoded bitstream obtained as a result of an encoding process. The MPEG encoder receives a past encoding parameters generated at a past encoding process as a history information, and performs a present encoding process by using the past encoding parameters selectively so that the present encoding process is optimized. Furthermore, the encoder describe the past encoding parameters into the encoded bitstream as the history information so as to reuse the history information in advance encoding process. The picture quality of the video data does not deteriorate even if decoding and encoding processes are carried out repeatedly by the transcoder.

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