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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Okamoto; Hiroo
Address:
Yokohama, JP
No. of patents:
104
Patents:


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Patent Number Title Of Patent Date Issued
RE34295 Signal processing circuit June 29, 1993
An integration type D/A and A/D converter having improved linearity and low power consumption. Logic circuits such as ECL counters consuming a major part of power of the D/A and A/D converters are realized through CMOS process. Current source circuits, current switch circuit and comparat
8589970 Content transmitter and receiver apparatus and content transmitting and receiving method November 19, 2013
A content transmitter apparatus is provided which decides whether to permit a content receiver apparatus at a content transmission destination to retransmit content to another content receiver apparatus located inside a house and transmits to the content receiver apparatus the conten
8588586 Recording method November 19, 2013
A recording method for recording received digital broadcasting on a medium, wherein system resume information including an operation mode at the time of playback and resume information for each piece of program information are separately recorded in a management file as resume inform
8270812 Input-output circuit, recording apparatus and reproduction apparatus for digital video signal September 18, 2012
A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal contain
8265452 Recording apparatus and method for recording a program and management information September 11, 2012
As a method of quickly displaying a thumbnail for navigation display of an AV stream, it is necessary to associate the AV stream with a thumbnail file when recording the thumbnail file separately from the AV stream file. The association, therefore, is performed by use of a serial number
8254758 Input-output circuit, recording apparatus and reproduction apparatus for digital video signal August 28, 2012
A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal contain
8225084 Content transmitting device, content receiving device and content transmitting method July 17, 2012
Before content transmission, the content transmitting device and the content receiving device mutually authenticate each other to verify that the other device respects copyright and rightfully handles content, and then content is encrypted by shared key data and transmitted. It is ar
8209534 Contents transmitter apparatus, contents receiver apparatus and contents transmitting method June 26, 2012
For achieving the protection of copyright, by suppressing illegal copy production thereof, in particular, when transmitting contents with using a wired or wireless LAN, as well as, for preventing the transmission of contents from deviating from a range of a personal use thereof, a co
8165453 Method and apparatus for data reproduction April 24, 2012
A data reproduction method and apparatus includes first circuitry to produce an information signal from a storage medium. The information signal includes copy control information. Detection circuitry is provided to detect the copy control information. Control circuitry is provided to
8042175 Digital signal processing apparatus October 18, 2011
If content is transmitted/received through a digital signal bus, protection of copyright causes a problem because of no deterioration in quality. Accordingly, authentication is required. The quantity of information to be processed is, however, so large that a long time is required fo
8010792 Content transmission apparatus, content reception apparatus and content transmission method August 30, 2011
A copyright of a content is protected by preventing creation of illegal copies of the content and the content is prevented from being transmitted beyond a range of personal use in a process to transmit the content through a LAN. Before transmission of a content, a content transmission
7856560 Digital information recording apparatus and recording/reproducing apparatus December 21, 2010
In a digital information recording/reproducing apparatus, information recorded on a hard disk with copy restriction thereof is protected from being copied onto other hard disks by means of a PC, etc., to be produced a large number of illegal copies, i.e., infringing a copyright.The i
7844986 Method and apparatus for receiving a digital signal and apparatus for recording and reproducing November 30, 2010
A method and apparatus is provided for receiving and/or reproducing a digital signal, capable of efficiently recording a compressed, packeted digital signal and inhibiting a copy thereof. An input packet signal is added with a time stamp indicating a relative time of an arrival of the
7836507 Contents transmitter apparatus, contents receiver apparatus and contents transmitting method November 16, 2010
For achieving the protection of copyright, by suppressing illegal copy production thereof, in particular, when transmitting contents with using a wired or wireless LAN, as well as, for preventing the transmission of contents from deviating from a range of a personal use thereof, a co
7757300 Digital information recording and reproducing method and apparatus therefor July 13, 2010
A method is disclosed wherein a first piece of digital information and copy control information of the first piece of digital information is received. The copy control information is for controlling the recording of the first piece of digital information on a recording medium. When the
7715692 Still picture information recording medium and method and apparatus for reproducing still pictur May 11, 2010
A technique is provided for reproducing information from a recording medium, on which there are recorded a plurality of picture information sets; presentation time values, each associated with a corresponding one of the picture information sets; picture information record marks, each
7711248 Still picture information recording medium and method and apparatus for reproducing still pictur May 4, 2010
A technique is provided for reproducing information from a recording medium, on which there are recorded a plurality of picture information sets; presentation time values, each associated with a corresponding one of the picture information sets; picture information record marks, each
7706541 Information management apparatus April 27, 2010
An information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus has a main information reproducing system for reproducing main information recorded in a given recording
7689100 Digital signal recording/reproducing apparatus March 30, 2010
A digital signal recording apparatus is disclosed, which is capable of protecting the copyright of the analog input information encoded into a first digital signal in a recording medium. A second digital signal encrypted based on the key information and the input analog signal encryp
7657158 Recording medium and method for reproducing information therefrom February 2, 2010
A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding on
7644265 Content transmitting device, content receiving device and content transmitting method January 5, 2010
Before content transmission, the content transmitting device and the content receiving device mutually authenticate each other to verify that the other device respects copyright and rightfully handles content, and then content is encrypted by shared key data and transmitted. It is ar
7643729 Recording medium and method for reproducing information therefrom January 5, 2010
A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding on
7613383 Editing method and recording and reproducing device November 3, 2009
In order to provide a recording and reproducing device that allows a user to select and manage arbitrary play lists, a unit of management for managing all registered play list information and an upper management hierarchical level are added. The unit of management is adapted to be ha
7599606 Recording medium and method for reproducing information therefrom October 6, 2009
A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding on
7587126 Video information outputting apparatus, video information receiving apparatus, video information September 8, 2009
According to a video information outputting apparatus, a video information receiving apparatus, a video information outputting method and a video information transmitting method, for receiving and outputting digital video information. The digital information is outputted in the same
7496280 Still picture information recording medium and method and apparatus for reproducing still pictur February 24, 2009
A technique is provided for reproducing information from a recording medium, on which there are recorded a plurality of picture information sets; presentation time values, each associated with a corresponding one of the picture information sets; picture information record marks, each
7483622 Recording medium and method for reproducing information therefrom January 27, 2009
A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding on
7472415 Digital signal processing apparatus December 30, 2008
If content is transmitted/received through a digital signal bus, protection of copyright causes a problem because of no deterioration in quality. Accordingly, authentication is required. The quantity of information to be processed is, however, so large that a long time is required fo
7450816 Digital signal recording and reproduction apparatus suitable for recording and reproducing a com November 11, 2008
A digital signal recording apparatus for recording in blocks on a recording medium an input digital signal in the form of a plurality of input packets. Each of the input packets has a predetermined number of bytes. A first time stamp has been added to each of the input packets in adv
7450815 Image recording and reproducing apparatus November 11, 2008
An image recording and reproducing apparatus can record and reproduce both a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated, and superimposition of information on an analog image is realized
7340613 Digital information recording apparatus and recording/reproducing apparatus March 4, 2008
In a digital information recording/reproducing apparatus, information recorded on a hard disk with copy restriction thereof is protected from being copied onto other hard disks by means of a PC, etc., to be produced a large number of illegal copies, i.e., infringing a copyright.The i
7319808 Input-output circuit, recording apparatus and reproduction apparatus for digital video signal January 15, 2008
A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal containing
7310823 Digital information recording apparatus and outputting apparatus December 18, 2007
A digital information recording apparatus includes multiple recording circuits for making multiple copies. The apparatus limits the number of copies, however, in accordance with copy information provided within the digital information itself. When the number of copies is reached, if
7289721 Method and apparatus for data reproduction October 30, 2007
A data reproduction method and apparatus includes first circuitry to produce an information signal from a storage medium. The information signal includes copy control information. Detection circuitry is provided to detect the copy control information. Control circuitry is provided to
7263723 Apparatus and method for outputting digital information August 28, 2007
The present invention provides a method and an apparatus that, when a copying is limited as "Copy One Generation", prevent the copying from being made into infinite number of storage media without limitation, and thereby protect the profit of a copyright holder concerned.In the present
7197232 Digital information recording-reproducing apparatus March 27, 2007
A digital information recording-reproducing apparatus for recording a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information
7197229 Digital signal recording devices, digital signal recording/playback devices, and digital signal March 27, 2007
A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal
7174088 Digital signal recording method, digital signal reproducing method, digital signal recording and February 6, 2007
A digital signal recording and reproducing method and apparatus using first, second, third, and fourth information as information to protect a copyright, the first and second information are added to the digital signal, the third information is inputted from the digital interface tog
7151888 Method and apparatus for temporarily giving copy permission for reproducing digital signals December 19, 2006
The digital signal recording/reproducing apparatus inputs a digital signal having a control flag as to a temporary copy permission, and records the digital signal temporarily into a recording medium in accordance with conditions in the control flag, then reproducing the digital signal
6920279 Digital signal recording devices, digital signal recording/playback devices, and digital signal July 19, 2005
A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal
6839851 Digital signal processing apparatus January 4, 2005
If content is transmitted/received through a digital signal bus, protection of copyright causes a problem because of no deterioration in quality. Accordingly, authentication is required. The quantity of information to be processed is, however, so large that a long time is required for
6807364 Digital information recording-reproducing apparatus October 19, 2004
A digital information recording-reproducing apparatus for recording and reproducing a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control
6804453 Digital signal recording/reproducing apparatus October 12, 2004
A digital signal recording apparatus is disclosed, which is capable of protecting the copyright of the analog input information encoded into a first digital signal in a recording medium. A second digital signal encrypted based on the key information and the input analog signal encryp
6771893 Recording apparatus and reproducing apparatus August 3, 2004
For achieving a recording apparatus and a reproducing apparatus enabling to function an interface of digital signals even when recording and reproducing analog signals, wherein the analog signal reproduced in an analog signal recording/reproducing circuit is converted into the digital
6763174 Image recording and reproducing apparatus July 13, 2004
An image recording and reproducing apparatus can record and reproduce both a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated, and superimposition of information on an analog image is realized duri
6757478 Method and apparatus for receiving a digital signal and apparatus for recording and reproducing June 29, 2004
A method and apparatus is provided for receiving and/or reproducing a digital signal, capable of efficiently recording a compressed, packeted digital signal and inhibiting a copy thereof. An input packet signal is added with a time stamp indicating a relative time of an arrival of the
6731451 Information management apparatus May 4, 2004
The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management a
6606385 Data encrypting/decrypting conversion methods and apparatuses and data communication system adop August 12, 2003
Encrypting/decrypting conversion method and apparatus capable of controlling dynamically cyclic shift independent of data to undergo encrypting/decrypting conversion includes two or more different fixed circulating shift processing means for shifting cyclically the data by a fixed bi
6600870 Input-output circuit, recording apparatus and reproduction apparatus for digital video signal July 29, 2003
A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal containing
6587638 Recording/ reproducing apparatus and input/ output device July 1, 2003
A recording/reproducing apparatus is provided for effecting digital processing to convert an analog video signal into a digital signal without losing character data superimposed over a vertical blanking period of the analog video signal. The recording/reproducing apparatus for converting
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