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1. 发明专利

JPS58100585A VIDEO AND AUDIO SIMULTANEOUS TRANSMISSION SYSTEM 失效
公开(公告)号：JPS58100585A
公开(公告)日：1983-06-15
申请号：JP19909981
申请日：1981-12-10
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE , FUJITSU LTD
发明人： SHIMOYAMA HARUO , OOSHIMA TOSHIO , NOMOTO SHINOBU , HIRAOKA MAKOTO , HANABATAKE TOSHIO
IPC分类号： H01L21/768 , H01L23/532 , H04N7/52 , H04N7/56 , H04N19/00 , H04N21/236 , H04N21/2368 , H04N21/242 , H04N21/43 , H04N21/434
摘要： PURPOSE:To transmit video and audio at the same time stably and accurately without increasing the scale of the hardware and complicated operation remarkably, by using a local synchronizing signal when a time of appearance of a horizontal synchronizing signal is not within a predetermined time range. CONSTITUTION:A video signal and an audio signal from input terminals 1, 2 are multiplexed at a multiplex circuit 7 and transmitted from an output terminal 11 via a parallel-series conversion circuit 10. A synchronizing signal switching circuit 8 receives a signal from a synchronizing signal separation circuit 5 and also a video sampling clock signal from a clock generation circuit 6 to generate a local synchronizing signal and a time window signal, and discriminates which of the horizontal synchronizing signal and the local synchronizing signal comes faster within a prescribed time range, and transmits the first-come signal to a control circuit 72 of the circuit 7.

2. 发明专利

JPS5382126A COLOR TELEVISION CODER 失效
公开(公告)号：JPS5382126A
公开(公告)日：1978-07-20
申请号：JP15886676
申请日：1976-12-27
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： OOSHIMA TOSHIO , SHIGAKI SEIICHIROU , SAWADA KATSUTOSHI
IPC分类号： H04N11/04
摘要： PURPOSE:To make unnecessary troublesome processing accompanied with the separation of signals, by arranging the data and processing the coding process through taking the brightness signal for two scanning line's share and the luminance signal for one scanning line's share.

3. 发明专利

JPH0526396B2 失效
公开(公告)号：JPH0526396B2
公开(公告)日：1993-04-15
申请号：JP16346283
申请日：1983-09-06
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H03M7/30 , F02D41/18 , F02D45/00

4. 发明专利

JPS6054581A DIFFERENCE ENCODING DEVICE 失效
公开(公告)号：JPS6054581A
公开(公告)日：1985-03-29
申请号：JP16346283
申请日：1983-09-06
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H03M7/30 , F02D41/18 , F02D45/00
摘要： PURPOSE:To suppress the increase of quantizing noises, by selecting plural quantizing characteristics by detecting not only the occupied ratio of a buffer memory but also the increasing ratio of the memory and fine quantizing characteristics when those ratios are lower than prescribed values. CONSTITUTION:Inputted TV signals are temporarily stored in a buffer memory 4 after they are converted into PCM signals by an A/D converter 1 and encoded in terms of difference at a difference encoder 2, and then, encoded in terms of variable length by a variable length encoder 3. The content of the memory 4 is read out at a speed corresponding to the transmitting bit rate and sent out to a transmission line. On the other hand, it is arranged that the difference encoder 2 can be switched in terms of the quantizing characteristic depending on the occupied ratio and increased ratio of the buffer memory 4, and therfore, a control signal for selecting quantizing characteristics is impressed upon the difference encoder 2 from the memory 4. Therefore, the information generating quantity of the output of the encoder is controlled.

5. 发明专利

JPS6054539A TRANSMISSION SYSTEM OF DIFFERENCE-ENCODED SIGNAL 失效
公开(公告)号：JPS6054539A
公开(公告)日：1985-03-29
申请号：JP16346383
申请日：1983-09-06
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H04N19/60 , H04B14/06
摘要： PURPOSE:To prevent discontinuance of signals by sending out input signals to plural transmission lines in the unit of group after they are difference-encoded and continuing the decoding of the encoded signals by using previous groups or other groups even when signal discontinuance or error occurs in the course of sending out. CONSTITUTION:Input signals IN are AD-converted 1 and disassembled into groups by making difference-encoding 2 on them. The signals are inputted into line interfaces 3 and 4 in the unit of group through plural transmission lines and sent out to transmission lines 5 and 6 after a line synchronizing signal is added to each group. At a decoding section signals of each transmission line 5 and 6 are impressed upon line interfaces 7 and 8 and decoded signals are obtained by means of a difference decoder 9 after extracting picture data and checking errors in the transmission line. When an error is detected, the difference decoder 9 prevents discontinuance of signals by switching the interfaces 7 and 8 or again using previous groups and continues its decoding operation. Therefore, signals are not discontinued completey although they are deteriorated more or less. This transmission system is ideal for the transmission of TV signals and sound signals.

6. 发明专利

JPS5847390A DEMODULATOR FOR STILL PICTURE COLOR TELEVISION SIGNAL 失效
公开(公告)号：JPS5847390A
公开(公告)日：1983-03-19
申请号：JP14551181
申请日：1981-09-17
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H04N9/79 , H04N9/87
摘要： PURPOSE:To prevent color deterioration of a still picture at a frame switching point of time by connecting >=1 phase shifter to an oscillator and selectively outputting an adequate phase shifter output, and thus obtaining a signal for color demodulation. CONSTITUTION:A phase difference circuit 41 obtains a subcarrier signal from an input signal 5 and a synchronizing signal 7, and outputs a control signal 49 which corresponds to the phase difference between said signal and the output signal 6 of a switch 44. This signal 49 is supplied to an oscillator 43. The output signal of the oscillator 43 is supplied through phase shifters 45 and 46 to obtain a 0 radian and a pi radian phase shift, and the outputs 47 and 48 of the phase shifters 45 and 46 are sent out selectively through the switch 44. The switch 44 outputs the outputs of the phase shifters 45 and 46 selectively in turns by using frame synchronizing pulses in the synchronizing signal 7. The output of the switch 44 is supplied as a signal 6 for color demodulation to a color demodulator which is not shown in the figure. Thus, color deterioration of a still picture at a frame switching point of time is prevented.

7. 发明专利

JPS57186840A PHASE SYNCHRONIZING OSCILLATOR 失效
公开(公告)号：JPS57186840A
公开(公告)日：1982-11-17
申请号：JP7252681
申请日：1981-05-14
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H03L7/081 , H03L7/08 , H04N9/45 , H04N9/79 , H04N9/87
摘要： PURPOSE:To obtain an output which stably follows an input varied within a range decided in advance, by providing a phase shifter for providing a fixed phase displacement to an oscillator output, and a switching device for selecting the nearest signal to phase of an input AC signal, in its phase shifter output and the oscillator output. CONSTITUTION:A phase difference of a subcarrier in a color burst period of an input signal from an input terminal 51, and an output of a switching device 56 is derived by a phase difference circuit 52 and is smoothed by a filter 53. By an output of this filter 53, oscillation frequency of an oscillator 54 is controlled so that an output of the circuit 52 becomes zero. Also, information of the color burst period is provided to the circuit 52 by a synchronizing signal from an input terminal 59, an output of the oscillator 54 is inputted to the switching device 56 and a phase shifter 55, and a phase value of + pi radian is provided by the phase shifter 55. Subsequently, in the switching device 56, the input subcarrier, an output of the oscillator 54 and an output of the phase shifter 55 are compared as to each phase, a signal being near the input subcarrier is selected, is supplied to the circuit 52, and simultaneously is outputted as an output of a phase synchronizing oscillator from an output terminal 58.

8. 发明专利

JPS5797224A FORECASTING CODER 失效
公开(公告)号：JPS5797224A
公开(公告)日：1982-06-16
申请号：JP17255580
申请日：1980-12-09
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO
IPC分类号： H03M3/02 , H03M3/04 , H03M7/38 , H03M7/50 , H04B14/06 , H04N11/00
摘要： PURPOSE:To improve the video quality to chrominance signal, by concentrating a forecast error distribution of a chrominance signal component around zero. CONSTITUTION:An NTSC color television signal is made for DC reproduction and band limit at a signal processing circuit 2, enters a difference circuit 3, and is taken for the difference with the output of a forecast circuit 8 and separated into a luminance signal component and a chrominance signal component at a separation circuit 4. The chrominance signal component passes through a companding circuit 5 and is added with the luminance signal component at an addition circuit 6. The output of addition is quantized at a quantizer 7 and outputted from an output terminal 9 to be a DPCM code. The output of the quantizer 7 is applied to the forecasting circuit 8 to be a forecasting signal. Minute quantization can be made to the chrominance signal component at the companding circuit 5 to improve the S/N.

9. 发明专利

JPS5160136A 1 bitsutofugoyodejitarufuirutaa 失效
标题翻译： 1 BITSUTOFUGOYODEJITARUFUIRUTAA
公开(公告)号：JPS5160136A
公开(公告)日：1976-05-25
申请号：JP13466574
申请日：1974-11-21
申请人： Nippon Electric Co
发明人： OOSHIMA TOSHIO
IPC分类号： H03H17/00 , H03H17/02 , H03H17/06

10. 发明专利

JPS6050115B2 失效
公开(公告)号：JPS6050115B2
公开(公告)日：1985-11-06
申请号：JP7452877
申请日：1977-06-24
申请人： NIPPON ELECTRIC CO
发明人： OOSHIMA TOSHIO , SHIGAKI SEIICHIRO
IPC分类号： H03M3/04 , H03M1/12 , H03M1/18 , H03M7/30 , H04B14/06 , H04N11/04

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