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公开(公告)号：AU521850B2
公开(公告)日：1982-05-06
申请号：AU4125178
申请日：1978-11-01
Applicant: SONY CORP
Inventor： KOMATSUBARA MICHIMASA , SHIMIZU IKUO
Abstract: In a teaching system having a central or master station and one or more student stations remote from the master station, there are provided, at the master station, at least one source of main signals in a first frequency band, which source may be constituted by a tape or other record player for reproducing teaching or instructional materials, a microphone or other source of audio signals from a proctor or supervisor of the teaching system, and a source of control signals which may include address signals for identifying one of the student stations and command signals for controlling various operations of the addressed student station. The audio and control signals are employed to modulate respective carriers so as to provide first and second auxiliary signals, respectively, in frequency bands which are removed from each other and from the first frequency band of the main signals, whereupon the main signals and the first and second auxiliary signals are multiplexed to provide a composite signal which, in turn, modulates a carrier of predetermined frequency suitable for being transmitted to each of the student stations.
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公开(公告)号：AU4125178A
公开(公告)日：1979-05-17
申请号：AU4125178
申请日：1978-11-01
Applicant: SONY CORP
Inventor： KOMATSUBARA MICHIMASA , SHIMIZU IKUO
Abstract: In a teaching system having a central or master station and one or more student stations remote from the master station, there are provided, at the master station, at least one source of main signals in a first frequency band, which source may be constituted by a tape or other record player for reproducing teaching or instructional materials, a microphone or other source of audio signals from a proctor or supervisor of the teaching system, and a source of control signals which may include address signals for identifying one of the student stations and command signals for controlling various operations of the addressed student station. The audio and control signals are employed to modulate respective carriers so as to provide first and second auxiliary signals, respectively, in frequency bands which are removed from each other and from the first frequency band of the main signals, whereupon the main signals and the first and second auxiliary signals are multiplexed to provide a composite signal which, in turn, modulates a carrier of predetermined frequency suitable for being transmitted to each of the student stations.
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公开(公告)号：CA2191667A1
公开(公告)日：1997-06-05
申请号：CA2191667
申请日：1996-11-29
Applicant: SONY CORP
Inventor： NARUSE TETSUYA , KOMATSUBARA MICHIMASA , IWASAKI JUN , MASAKI TERUO , MORI KANAME
IPC: H04N5/765 , G06F21/10 , G11B20/00 , G11B20/10 , H04N5/781 , H04N5/91 , H04N5/913 , H04N5/92 , H04N7/08 , H04N7/167 , H04N21/4367 , G11B5/02 , G11B27/00
Abstract: A synthesis signal which was reproduced from a reproducing apparatus and converted into an analog signal includes an analog information signal and a copy control code. The copy control code is modulated by a spread spectrum. A code reading unit of the recording apparatus extracts a copy control code by an inverse spread spectrum. A code changing unit changes the copy control code by a spread spectrum as necessary. An output signal of the code changing unit is converted into a digital signal. The digital signal is subjected to processes necessary for recording and is recorded to a recording medium.
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公开(公告)号：HK72294A
公开(公告)日：1994-08-05
申请号：HK72294
申请日：1994-07-28
Applicant: SONY CORP
Inventor： HIGASHLYAMA MITSUO , KOMATSUBARA MICHIMASA , YAMAGATA MASATO
IPC: H04B1/40 , H04B7/26 , H04Q7/38 , H04M1/00 , H04M1/725 , H04M1/727 , H04W84/10 , H04B1/44 , H04Q7/02
Abstract: Apparatus for transmitting and receiving signals for use with a so-called cordless telephone, in which an audio signal and an identification code signal are transmitted and received by both the handset and base unit of the telephone and when the identification code signal is not correctly detected, as might be caused by cross-talk interference, the transmitter is disabled and a vacant communication channel is searched for and a communication channel is changed to thereby prevent a cross-talk interference. The unit that does not correctly receive the code signal immediately disables its transmitter and searches for a vacant channel and, because the code signal had been alternately transmitted and received between the two units, the other unit detects the stoppage of code signal transmission, disables its own transmitter, and then also moves to the next vacant channel to await further transmission of the code signal.
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公开(公告)号：GB2176974B
公开(公告)日：1990-01-17
申请号：GB8613761
申请日：1986-06-06
Applicant: SONY CORP
Inventor： HIGASHIYAMA MITSUO , KOMATSUBARA MICHIMASA , YAMAGATA MASATO
Abstract: Apparatus for transmitting and receiving signals for use with a so-called cordless telephone, in which an audio signal and an identification code signal are transmitted and received by both the handset and base unit of the telephone and when the identification code signal is not correctly detected, as might be caused by cross-talk interference, the transmitter is disabled and a vacant communication channel is searched for and a communication channel is changed to thereby prevent a cross-talk interference. The unit that does not correctly receive the code signal immediately disables its transmitter and searches for a vacant channel and, because the code signal had been alternately transmitted and received between the two units, the other unit detects the stoppage of code signal transmission, disables its own transmitter, and then also moves to the next vacant channel to await further transmission of the code signal.
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Patent Agency Ranking
公开(公告)号：CA1247705A
公开(公告)日：1988-12-27
申请号：CA510785
申请日：1986-06-04
Applicant: SONY CORP
Inventor： HIGASHIYAMA MITSUO , KOMATSUBARA MICHIMASA , YAMAGATA MASATO
Abstract: Apparatus for transmitting and receiving signals for use with a so-called cordless telephone, in which an audio signal and an identification code signal are transmitted and received by both the handset and base unit of the telephone and when the identification code signal is not correctly detected, as might be caused by cross-talk interference, the transmitter is disabled and a vacant communication channel is searched for and a communication channel is changed to thereby prevent a cross-talk interference. The unit that does not correctly receive the code signal immediately disables its transmitter and searches for a vacant channel and, because the code signal had been alternately transmitted and received between the two units, the other unit detects the stoppage of code signal transmission, disables its own transmitter, and then also moves to the next vacant channel to await further transmission of the code signal.
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公开(公告)号：AU570226B2
公开(公告)日：1988-03-10
申请号：AU2225883
申请日：1983-12-09
Applicant: SONY CORP
Inventor： SUGITA TAKEHIRO , SAKAMOTO AKIRA , FUKAMI TAKESHI , KOMATSUBARA MICHIMASA , SHIMIZU AKIRA
Abstract: A digital signal composing circuit includes a first selector (7) for selecting a plurality of digital data, a second selector (6) for selecting one of the digital data and a feedback signal, a control circuit (14) for controlling the switching of the first and second selectors (7, 6) and an adding circuit (8) for adding outputs of the first and second selectors (7, 6) and supplying the added output to the second selector (6) as the feedback signal wherein the final output is derived from the adding circuit (8).
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公开(公告)号：CA1214266A
公开(公告)日：1986-11-18
申请号：CA443844
申请日：1983-12-20
Applicant: SONY CORP
Inventor： KOMATSUBARA MICHIMASA , FUKAMI TAKESHI , SAKAMOTO AKIRA , SUGITA TAKEHIRO , MIYATA TOSHIYA
Abstract: SYSTEM FOR DETECTING A MARKER SIGNAL INSERTED IN AN INFORMATION SIGNAL A system for detecting a marker signal with a predetermined pattern inserted periodically in an information signal comprises a circuit which repetitively generates window signals and successively shifts the window signals in a step-wise fashion during a predetermined interval, a detecting circuit which employs the window signals to detect at least a portion of a marker signal in the information signal when at least the portion of the detected marker signal occurs during one of the window signals, a circuit which determines when the detected marker signal has the predetermined pattern to generate a net marker signal in response thereto, and a circuit responsive to the net marker signal which repetitively generates subsequent unshifted window signals beginning a predetermined time after the detected marker signal.
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公开(公告)号：AU5465180A
公开(公告)日：1980-08-07
申请号：AU5465180
申请日：1980-01-16
Applicant: SONY CORP
Inventor： SOMENO NOBORU , KOMATSUBARA MICHIMASA , TOYOSHIMA MASAKATSU
Abstract: In tuning apparatus, a sensor senses when a tune indicating signal has been produced by the IF section so as to enable an adjusting circuit to change the tuning condition of the apparatus by a predetermined frequency step and then to disable the adjusting circuit if the tune indicating signal still is sensed following this frequency change so as to maintain the last-attained tuning condition. Alternatively, if the tune indicating signal no longer is sensed after the tuning condition has been changed by the predetermined frequency step, the tuning section is returned to its preceding tuning condition by this predetermined frequency step. Consequently, if the received signal is a high level signal at a frequency within a predetermined range from a broadcast frequency, the tune indicating signal is produced when the tuning condition of the tuning section differs from the broadcast frequency by this predetermined frequency step; and the tuning condition then is changed by this step so as to arrive at the desired broadcast frequency. If, however, the received signal is a low level signal, the tune indicating signal is produced only when the tuning condition of the tuning section coincides with a desired broadcast frequency, and then this tuning condition is changed by one step followed by a return of one step to the proper condition.
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公开(公告)号：DE2848142A1
公开(公告)日：1979-07-05
申请号：DE2848142
申请日：1978-11-06
Applicant: SONY CORP
Inventor： KOMATSUBARA MICHIMASA , SHIMIZU IKUO
Abstract: In a teaching system having a central or master station and one or more student stations remote from the master station, there are provided, at the master station, at least one source of main signals in a first frequency band, which source may be constituted by a tape or other record player for reproducing teaching or instructional materials, a microphone or other source of audio signals from a proctor or supervisor of the teaching system, and a source of control signals which may include address signals for identifying one of the student stations and command signals for controlling various operations of the addressed student station. The audio and control signals are employed to modulate respective carriers so as to provide first and second auxiliary signals, respectively, in frequency bands which are removed from each other and from the first frequency band of the main signals, whereupon the main signals and the first and second auxiliary signals are multiplexed to provide a composite signal which, in turn, modulates a carrier of predetermined frequency suitable for being transmitted to each of the student stations.
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