Search Patents
  • Digital to analog converter with power amplification
    Patent number: 4121205
    Abstract: A power amplifier has an input terminal supplied with a PCM (pulse code modulated) signal and a plurality of power supplies, each producing a voltage weighted according to the order of bits of the PCM-code. Switching means are controlled by the PCM input signal to connect selective ones of the power supplies in series to a load in response to the PCM signal.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: October 17, 1978
    Assignee: Sony Corporation
    Inventors: Akira Iga, Toshitada Doi
  • Stabilized transistor amplifier
    Patent number: 3980963
    Abstract: A stabilized transistor amplifier including an amplifying transistor and its biasing circuit consisting of such elements as a power supply source, diodes and resistors in which several circuit constrants of the biasing circuit at a certain pre-selected temperature are selected so as to compensate for or cancel changes in characteristic of the amplifying transistor, the power supply source, the diodes and the resistors in combination, so that the amplifier operates stably over a wide range of the ambient temperature.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: September 14, 1976
    Assignee: Sony Corporation
    Inventor: Toshitada Doi
  • Stereophonic sound reproduction system
    Patent number: 4069394
    Abstract: In a stereophonic sound reproduction system in which stereophonic left and right signals are treated to have a level difference therebetween for establishing a localized sound image spaced from the midpoint between left and right loudspeakers, the level difference between such left and right signals is reduced as the frequency thereof increases for improving the localization of the sound image resulting from the application of the resulting or converted left and right signals to the left and right loudspeakers.
    Type: Grant
    Filed: June 2, 1976
    Date of Patent: January 17, 1978
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Hitoshi Wakabayashi
  • Data supplying method and device thereof
    Patent number: 5953721
    Abstract: A method and apparatus for improving the efficiency of providing updated data over a transmission medium. Each data has associated information indicating the presence or absence of validity data. An absence of validity data indicates that the data does not need to be updated. The presence of validity data allows only that data which needs updating to be transferred on the transmission medium, thereby improving its performance.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: September 14, 1999
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Makoto Ishii
  • Binaural sound pickup
    Patent number: 4068091
    Abstract: A binaural sound pickup assembly composed of a hollow cone-like member made of plastic resin and having a flange member on its rear portion on the larger diameter portion of the cone-like member and with a pair of microphones mounted by mounting means at both sides of the cone-like member adjacent the flange member and wherein the hollow cone-like member simulates the acoustic characteristics of a human head but which does not give the physical appearance of a human head.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: January 10, 1978
    Assignee: Sony Corporation
    Inventor: Toshitada Doi
  • Burst-error correcting system
    Patent number: 4355392
    Abstract: In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to have different delay times to each other, and the signals thus delayed are again added bit by bit in a modulo-2 adder to produce a second parity signal. The predetermined number of words of information signals and first and second parity signals are serially transmitted through a transmission line.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: October 19, 1982
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Akira Iga
  • Data supplying method and device therefor
    Patent number: 6119119
    Abstract: In a data providing method and device thereof for providing data in a simple manner at a highly efficient transmission rate, first data of a configuration where information relating to a valid period of data is added to the data is made and provided, with the first data being categorized and stored in accordance with the information. Information for second data of the same configuration as the first data is then recognized and the first data is replaced with the second data in accordance with results of the recognition.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: September 12, 2000
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Makoto Ishii
  • Method and device for detecting presence or absence of validity in data needed to be updated
    Patent number: 6289351
    Abstract: In a data providing method and device thereof for providing data in a simple manner at a highly efficient transmission rate, first data of a configuration where information relating to a valid period of data is added to the data is made and provided, with the first data being categorized and stored in accordance with the information. Information for second data of the same configuration as the first data is then recognized and the first data is replaced with the second data in accordance with results of the recognition.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: September 11, 2001
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Makoto Ishii
  • Fluid flow control speaker system
    Patent number: 4194095
    Abstract: A fluid flow control system has a fluid source and plural flow pipes connected to the fluid source. Each of the pipes has an opening of a specific area corresponding to one of the bit orders of a PCM (Pulse Code Modulated) input signal. The flow-condition of the fluid through each of the pipes is controlled by the PCM signal without changing the PCM signal to an analog signal. The summation of the outflow from each of the pipes combines to produce an analog flow output signal in response to the PCM input signal.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: March 18, 1980
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Akira Iga, Osamu Hamada, Jyoji Hukuda, Yuichiro Hamada
  • Video signal recorder/reproducer for recording and reproducing pulse signals
    Patent number: 4138694
    Abstract: A video signal recorder/reproducer is used to record and/or reproduce pulse signals in successive tracks on a record medium. During recording, the pulse signals, which may, as one example, represent audio information, are interleaved with simulated horizontal and vertical synchronizing signals of the type similar to the synchronizing signals which normally are included in a composite video signal. During signal reproduction, the reproduced simulated horizontal and vertical synchronizing signals are detected and used to control the recovery of data from the reproduced pulse signals.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: February 6, 1979
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Akira Iga
  • Information processing apparatus, information processing method, data recording medium, and information processing system
    Patent number: 5887130
    Abstract: An improvement in protecting information transmitted via a network from illegal copying is disclosed. While data input from an information provider via a network is stored in a storage device, an ID inherent in an information terminal unit stored in a ROM, the time information which is output from a real-time clock counter, an ID of the owner of an ID card read by a card reader are multiplex-recorded as identification information on the input data. Identification information is also multiplex-recorded on the data read from the storage device and to be output through the output terminal.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: March 23, 1999
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Yoshitomo Osawa
  • Sound pickup assembly
    Patent number: 4037052
    Abstract: A sound pickup assembly comprising a parabolic reflector in the focal point of which is mounted a pickup and wherein the reverse side of the parabolic reflector is formed as a binaural sound pickup having a pair of microphones mounted on opposite sides of the curved surface generally on a horizontal plane and including a pair of dummy external ears mounted near the pair of microphones such that the pickup can be used as a highly directive pickup utilizing the single microphone and parabolic reflector and wherein the unit can also be utilized for binaural pickup by utilizing the two antennas and dummy ears mounted on the back surface of the unit.
    Type: Grant
    Filed: July 13, 1976
    Date of Patent: July 19, 1977
    Assignee: Sony Corporation
    Inventor: Toshitada Doi
  • Information processing apparatus, information processing method, data recording medium, and information processing system
    Patent number: 6742118
    Abstract: An improvement in protecting information transmitted via a network from illegal copying is disclosed. While data input from an information provider via a network is stored in a storage device, an ID inherent in an information terminal unit stored in a ROM, the time information which is output from a real-time clock counter, an ID of the owner of an ID card read by a card reader are multiplex-recorded as identification information on the input data. Identification information is also multiplex-recorded on the data read from the storage device and to be output through the output terminal.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: May 25, 2004
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Yoshitomo Osawa
  • PCM Signal transmitting system with error detecting and correcting capability
    Patent number: 4306305
    Abstract: A PCM (pulse code modulation) signal transmission system processes sequentially transferred digital information words including two error correcting words consisting of a parity code word and a b-adjacent code word and adds them to the digital information words, time-interleaves each of the information words and its error correcting words in the block into time-interleave blocks distributed over a predetermined time, adds an error detecting code to at least one of the time-interleaved blocks, and transmits at least one time-interleaved block and error correcting code associated therewith. Method and apparatus for de-interleaving and error correction based on the three appended codes are included.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: December 15, 1981
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Kentaro Odaka
  • Content selection system
    Patent number: 7197455
    Abstract: A client 2 includes a transmission unit 2d for transmitting the input speech information over a network to a server system 3 and an output unit 2b for receiving the contents selection information from the server system 3 over the network to output the received information. The server system 3 includes a prepared information storage unit 9b for memorizing one or more pieces of the preparation information pertinent to each contents, from one contents to another, and an information preparing server 7 for preparing the contents selection information based on the speech information received from the client 2 over the network and on the preparation information to send the so-prepared contents selection information to the client 3 over the network.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: March 27, 2007
    Assignee: Sony Corporation
    Inventors: Fukuharu Sudo, Makoto Akabane, Toshitada Doi
  • Method of digital signal transmission
    Patent number: 4644546
    Abstract: There is disclosed a method of digital signal transmission in which, for serially transmitting digital data of N channels, where N may for example be 16, 24 or 32, these data are serially and successively transmitted in groups of M, where M may for example be 2, 3 or 4, with each said group including data of K channels, where K may for example be 8, and in which a preamble with a pattern violating the rule of modulation for data transmission is provided, for example, at the foremost part of each such group, a data validity evaluation bit is added to the data of each such channel, and parity data is also provided to the totality of bits of each such group. A group address may also be provided to each such group for indicating its group number within the M groups.
    Type: Grant
    Filed: August 14, 1984
    Date of Patent: February 17, 1987
    Assignees: Sony Corporation, Willi Studer AG
    Inventors: Toshitada Doi, Claudia Brandes, Roger Lagadec
  • Error correcting system
    Patent number: 4238852
    Abstract: Blocks of digital words containing an error correcting word are time interleaved into time-interleaved blocks of words, each of which contains no more than one word from any one of the original blocks. The time-interleaved blocks of words are converted to a bit-by-bit serial digital data stream which is time-base compressed to permit insertion therein of an error detecting code word and synchronizing signals. The resulting serial data stream may be recorded on a VTR. After reproduction, each time interleaved block is checked for errors and is then time de-interleaved to reconstruct the original blocks of digital words. If one or more errors exist in words in a time-interleaved block, no more than a single word in any one of the time de-interleaved blocks contains an error. Single-word errors in a reconstructed block are corrected using the error correcting word accompanying the reconstructed block.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: December 9, 1980
    Assignee: Sony Corporation
    Inventors: Akira Iga, Toshitada Doi
  • Digital signal transmission system with encoding and decoding sections for correcting errors by parity signals transmitted with digital information signals
    Patent number: 4356564
    Abstract: In a digital signal transmission system in which interleaved sequences of digital words are transmitted on respective channels, the words in each sequence are added bit-by-bit in a first modulo-two adder to produce a first parity signal, the latter and selected ones of the sequences of digital words have imparted thereto different respective delay times, and then the sequences of digital words and the first parity signal are added bit-by-bit in a second modulo-two adder to produce a second parity signal. The second parity signal is delayed a predetermined amount and fed back to the first modulo-two adder. Then, the interleaved sequences of digital words and the first and second parity signals are serially transmitted on a transmission medium, which can be a video tape. The transmission system is capable of correcting burst errors occurring in more than three successive digital words.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: October 26, 1982
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Shunsuke Furukawa, Kenji Nanba
  • Method of recording odd and even words of one channel PCM signals in plural tracks
    Patent number: 4622598
    Abstract: Described is a method for PCM signal recording in which, when single-channel or multichannel PCM signals are recorded so that one-channel PCM signals are recorded in plural recording tracks, the input PCM signals of one channel are correspondingly distributed to the plural recording tracks with at least one word as a unit, and in which the distributed plural signals are subjected to an encoding operation independently of one another and are recorded on the plural recording tracks. In distributing the input PCM signals by word units, word groups consisting of a predetermined number of consecutive words are sequentially distributed to the recording tracks, or plural consecutive words equal in number to the number of recording tracks are distributed to the tracks.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: November 11, 1986
    Assignees: Sony Corporation, Willi Studer AG
    Inventors: Toshitada Doi, Claudia Brandes, Roger Lagadec
  • Burst-error correcting system
    Patent number: RE31666
    Abstract: In a digital signal transmission system, a predetermined number of words of digital information signals are added bit by bit in a modulo 2 adder to produce a first parity signal. The information signals and the first parity signal are delayed so as to have different delay times to each other, and the signals thus delayed are again added bit by bit in a modulo-2 adder to produce a second parity signal. The predetermined number of words of information signals and first and second parity signals are serially transmitted through a transmission line.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: September 11, 1984
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Akira Iga
Narrow Results

Filter by US Classification