Patents by Inventor Katsumi Tahara
Katsumi Tahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8982946Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: March 17, 2015Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8948251Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: February 3, 2015Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8938000Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: January 20, 2015Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8934536Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: January 13, 2015Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8687690Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: April 1, 2014Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8638849Abstract: 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.Type: GrantFiled: July 17, 2007Date of Patent: January 28, 2014Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 8170118Abstract: Encoding parameters of picture and higher layers of importance to a number of applications, and encoding parameters of slice and lower layers of no importance to all applications are converted into auxiliary packets inserted respectively into a V-blanking area and an H-blanking area of a video-data signal output by a history-information-multiplexing apparatus employed in a video-decoding system. On the other hand, a video-encoding system extracts back the auxiliary packets superposed on the V-blanking area and the H-blanking area from an input base-band video signal. As a result, a technique of superposing information on data can be changed in accordance with the importance of the information and required information can be fetched with ease.Type: GrantFiled: August 28, 2006Date of Patent: May 1, 2012Assignee: Sony CorporationInventors: Takuya Kitamura, Mamoru Ueda, Katsumi Tahara
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Patent number: 8160134Abstract: The present invention relates to an encoding system for encoding input video data and a multiplexing system for multiplexing a plurality of encoded streams. More particularly, it proposes a system and method that involve describing, in encoded streams, information on the picture order of input video data, and using the picture order information when generating packetized elementary stream (PES) packets, to prevent delays associated with the PES packet generation. MPEG encoders generate PTS_count and DTS_count based on the information obtained from the number of fields in the input video data and describe the PTS_count and DTS_count data as picture order information in encoded streams. The packetizers for generating packetized elementary stream take out PTS_count and DTS_count described in the encoded streams, generate presentation time stamps and decoding time stamps based on PTS_count and DTS_count, and add these time stamps as PES header data.Type: GrantFiled: June 18, 2009Date of Patent: April 17, 2012Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami
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Patent number: 7953718Abstract: A UMID extracting/embedding unit 10 extracts UMID data embedded in material data. A CPU 11 updates a generation indicated by generation data in the extracted UMID data to generate new generation data when processing accompanied by a deterioration of quality is applied to the material data such as recording to a database 8. The UMID extracting/embedding unit 10 embeds the new generation data in the material data.Type: GrantFiled: February 26, 2003Date of Patent: May 31, 2011Assignee: Sony CorporationInventors: Yoshiaki Shibata, Takumi Yoshida, Katsumi Tahara
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Publication number: 20090252231Abstract: The present invention relates to an encoding system for encoding input video data and a multiplexing system for multiplexing a plurality of encoded streams. More particularly, it proposes a system and method that involve describing, in encoded streams, information on the picture order of input video data, and using the picture order information when generating packetized elementary stream (PES) packets, to prevent delays associated with the PES packet generation. MPEG encoders generate PTS_count and DTS_count based on the information obtained from the number of fields in the input video data and describe the PTS_count and DTS_count data as picture order information in encoded streams. The packetizers for generating packetized elementary stream take out PTS_count and DTS_count described in the encoded streams, generate presentation time stamps and decoding time stamps based on PTS_count and DTS_count, and add these time stamps as PES header data.Type: ApplicationFiled: June 18, 2009Publication date: October 8, 2009Inventors: Katsumi Tahara, Yoshihiro Murakami
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Patent number: 7551672Abstract: The present invention relates to an encoding system for encoding input video data and a multiplexing system for multiplexing a plurality of encoded streams. More particularly, it proposes a system and method that involve describing, in encoded streams, information on the picture order of input video data, and using the picture order information when generating packetized elementary stream (PES) packets, to prevent delays associated with the PES packet generation. MPEG encoders generate PTS_count and DTS_count based on the information obtained from the number of fields in the input video data and describe the PTS_count and DTS_count data as picture order information in encoded streams. The packetizers for generating packetized elementary stream take out PTS_count and DTS_count described in the encoded streams, generate presentation time stamps and decoding time stamps based on PTS_count and DTS_count, and add these time stamps as PES header data.Type: GrantFiled: February 4, 2000Date of Patent: June 23, 2009Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami
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Patent number: 7469007Abstract: 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.Type: GrantFiled: January 14, 2003Date of Patent: December 23, 2008Assignee: Sony CorporationInventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Publication number: 20080232464Abstract: 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.Type: ApplicationFiled: July 17, 2007Publication date: September 25, 2008Inventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: 7379479Abstract: The present invention is an apparatus and method to remove delay fluctuations generated on a plurality of networks. A reception apparatus 22 receives ATM cells transmitted through a network 4-1 and a network 4-2, converting the cells into a transport stream. At that time, the reception apparatus 22 expresses a PCR packet's timing of arrival at the reception apparatus 22 by a count value obtained as a result of counting the number of clock pulses (clock pulses Nr) synchronous with a network clock signal of the network 4-2. The reception apparatus 22 also computes a new PCR value W on the basis of the count value and the phase-difference information used as synchronization information. The reception apparatus 22 then computes a new PCR value X on the basis of an original PCR value E recorded from the beginning on the encoding side and the PCR value W, newly recording the PCR value X.Type: GrantFiled: September 25, 2002Date of Patent: May 27, 2008Assignee: Sony CorporationInventors: Yoichi Matsumura, Katsumi Tahara, Hiroaki Seto, Eisaburo Itakura, Hiroshi Meguro
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Publication number: 20080013625Abstract: 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.Type: ApplicationFiled: July 17, 2007Publication date: January 17, 2008Inventors: Katsumi Tahara, Yoshihiro Murakami, Takuya Kitamura, Kanji Mihara
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Patent number: RE40415Abstract: A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.Type: GrantFiled: February 2, 2000Date of Patent: July 1, 2008Assignee: Sony CorporationInventors: Katsumi Tahara, Hiromi Yoshinari
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Patent number: RE43021Abstract: A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.Type: GrantFiled: May 12, 2008Date of Patent: December 13, 2011Assignee: Sony CorporationInventors: Katsumi Tahara, Hiromi Yoshinari
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Patent number: RE43043Abstract: A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.Type: GrantFiled: May 12, 2008Date of Patent: December 27, 2011Assignee: Sony CorporationInventors: Katsumi Tahara, Hiromi Yoshinari
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Patent number: RE43111Abstract: A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.Type: GrantFiled: May 12, 2008Date of Patent: January 17, 2012Assignee: Sony CorporationInventors: Katsumi Tahara, Hiromi Yoshinari
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Patent number: RE43238Abstract: A picture type identifier, indicating one of intra-picture coding (an I-picture), forward or backward predictive coding (a P-picture) and bi-directionally predictive coding (a B-picture), is included with a picture signal when the signal is encoded and when the signal is decoded. Each of initial and subsequent encoding and decoding is a function of the included picture type.Type: GrantFiled: May 12, 2008Date of Patent: March 13, 2012Assignee: Sony CorporationInventors: Katsumi Tahara, Hiromi Yoshinari