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1. 发明专利

JP2001177454A SITE DIVERSITY METHOD, METHOD FOR RECEIVING DIGITAL SATELLITE BROADCAST AND DIGITAL SATELLITE BROADCAST RECEIVER 失效
公开(公告)号：JP2001177454A
公开(公告)日：2001-06-29
申请号：JP36087599
申请日：1999-12-20
申请人： KENWOOD CORP , JAPAN BROADCASTING CORP
发明人： SHIRAISHI KENICHI , HORII AKIHIRO , MATSUDA SHOJI , OKAMURA HIROSHI , NAKAJIMA TOMOKAZU , FUJII TAKANORI , NISHIJIMA SUSUMU , MIYAMOTO MAKI
IPC分类号： H04B7/02 , H04B7/08 , H04B7/15 , H04B7/185 , H04B7/212 , H04H20/00 , H04H20/26 , H04H20/74 , H04L1/06 , H04L7/04 , H04L7/08 , H04N5/44 , H04H1/00
摘要： PROBLEM TO BE SOLVED: To provide a site diversity method that decreases deviation between the transmission timing of data output from a main station and transmission timing of data output from a sub station in the case of a site changeover and that can quickly attain re-synchronization and to provide a method for receiving digital satellite band and a digital satellite broadcast receiver. SOLUTION: This invention provides the site diversity method in a digital satellite broadcast in which sites are switched within a TMCC information period in a predetermined frame in a super-frame decided when a site switching execution instruction signal is received.

2. 发明专利

JPH08336132A METHOD AND DEVICE FOR VIDEO CODING 失效
公开(公告)号：JPH08336132A
公开(公告)日：1996-12-17
申请号：JP14330495
申请日：1995-06-09
申请人： JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI , TANAKA TADAAKI , SHIBUYA KAZUHIKO
IPC分类号： H04N19/126 , H03M7/30 , H04N1/41 , H04N7/24 , H04N19/00 , H04N19/154 , H04N19/196 , H04N19/423 , H04N19/503 , H04N19/51 , H04N19/593 , H04N19/61 , H04N19/625 , H04N19/91
摘要： PURPOSE: To provide a method and a device for video coding capable of reducing the fluctuation width of generating quantity of coded data due to the complicated video signal. CONSTITUTION: An arithmetic circuit 10 calculates the table number of a scaler in which the bit rate of the coded data shows a rate nearest to a prescribed transmission bit rate in advance. A third encoder circuit 3 receiving a calculated result inputs the video signal delayed by a prescribed time by a delay circuit 4, and performs the coding of the video signal by using the table of a computed sealer.

3. 发明专利

JPH0846976A PREDICTIVE CODING DEVICE 失效
公开(公告)号：JPH0846976A
公开(公告)日：1996-02-16
申请号：JP19781494
申请日：1994-07-29
申请人： NEC CORP , JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI , KATSUBE RYOJI , TSUTSUI TAKEO , MIYOSHI TAKASHI
IPC分类号： H04N7/30 , G06T9/00 , H04N7/32
摘要： PURPOSE:To provide a predictive coding device capable of preventing deterioration of picture by controlling a quantization width in accordance with the presence/absence of the correlation of pictures within space time. CONSTITUTION:Input and output picture data of a frame memory 11 and output picture data of a frame memory 12 are respectively inputted to a correlation coefficient calculation part 13 and the part 13 divides them into the blocks of the picture elements of 8X8 so as to calculate a correlation coefficient between a present output frame picture and respective frame pictures before and after it by one frame in the area and a correlation coefficient between the lines in horizontal and vertical directions within a present frame. A judgement part 16 decides the quantization width of a quantization part 17 in accordance with a output data quantity from an output buffer memory 24 and furthermore, at the time of judging that the sum sigma of the correlation coefficients is smaller than a threshold value kappa and not-correlated and that the distribution of the frequency spectrums of an information source is uniform based on an orthogonal transforming coefficient from an orthogonal transformation part 15, the part 16 judges the small area of the block of the picture element of 8X8 which is the object is a not-correlated part and makes the quantization width rough.

4. 发明专利

JPH0715225A BUILDING PROVIDED WITH ANTENNA ON OUTER WALL SURFACE 失效
公开(公告)号：JPH0715225A
公开(公告)日：1995-01-17
申请号：JP17208693
申请日：1993-06-21
申请人： TAISEI CORP , JAPAN BROADCASTING CORP
发明人： NISHIMURA MASAHIRO , ISHII AKIRA , OKAMURA HIROSHI , FUJIWARA SHINICHI , OTANI MAKOTO
IPC分类号： E04H12/12 , H01Q1/44
摘要： PURPOSE:To facilitate the installation of an antenna and to cancel radio wave faults caused by the shadow of the building by installing a conductor as the antenna for high frequency on the outer wall surface or the surface of the window of the building so as to radiate or absorb radio waves with the conductor. CONSTITUTION:A conductor 3 is embedded in an outer wall panel 2 (insulated object) of the building and in the building inside direction of the outer wall panel 2, as a reflector 4, a metal board or metal mesh is fitted and grounded. When radiating radio waves, a voltage is impressed between terminals 3a and 3a of the conductor 3. Thus, the radio waves are radiated from the conductor 3 to the front direction of the outer wall surface of the building. When receiving radio waves, the radio waves are absorbed by the conductor 3. In this case, since the place of antenna installation is not selected, the antenna installation is facilitated. When using the building for mobile object communication, it is possible to increase the number of antennas to be installed, and area division can be made fine. On the other hand, at a building in the shadow of that building, radio wave faults are canceled.

5. 发明专利

JPH06112920A DIGITAL 2-CHANNEL RADIO TRANSMITTER FOR ORTHOGONAL POLARIZATION 失效
公开(公告)号：JPH06112920A
公开(公告)日：1994-04-22
申请号：JP25674092
申请日：1992-09-25
申请人： JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI , FUJITANI IKUSHI
IPC分类号： H04B1/10 , H04J11/00
摘要： PURPOSE:To stably send two digital signals by improving the separation between polarized waves equivalently even when the separation of the polarized waves is wrong. CONSTITUTION:A 1st channel reception section 23 adjusts the amplitude and phase of a reception signal of a 1st channel reception section 23 based on the frequency of occurrence of an error of a 2nd channel reception section 24 and the result is fed to the 2nd channel reception section 24 as a crosstalk cancel signal to cancel a reception signal component of the 1st channel mixed in the reception signal of the 2nd channel, and a 2nd channel reception section 24 adjusts the amplitude and phase of a reception signal of the 1st channel reception section 23 based on the frequency of occurrence of an error of the 1st channel reception section 23 and the result is fed to the 1st channel reception section 23 as a crosstalk cancel signal to cancel a reception signal component of the 2nd channel mixed in the reception signal of the 1st channel.

6. 发明专利

JPH05137161A DIGITAL COMPRESSION ENCODING METHOD FOR COMPOSITE IMAGE SIGNAL 失效
公开(公告)号：JPH05137161A
公开(公告)日：1993-06-01
申请号：JP29431991
申请日：1991-11-11
申请人： JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI , HARA TOSHIAKI
IPC分类号： H04N11/04
摘要： PURPOSE:To obtain an efficient television image signal band compression encoding method. CONSTITUTION:This method is provided with an adding circuit 3 and a subtracting circuit 4 which are provided with a chrominance subcarrier whose frequency has an integer multiple of half of a horizontal scanning frequency, form successively a pair of signals of two pieces of upper and lower adjacent lines in a field with to an input composite signal, and add and subtract the signals of these two pieces of lines at every pair, at the time of executing digital compression encoding of a color television composite image signal. In such a state, an output of the adding circuit 3 remains as it is, an output of the sub-tracing circuit 4 is allowed to pass through a circuit 5 in which positive and negative are reversed at every frame, and thereafter, adaptive DCT processing 7, 8 are performed, and an input composite image signal is subjected digital compression encoding.

7. 发明专利

JPS62178027A LINE SETTING SYSTEM IN MOBILE RADIO COMMUNICATION 失效
公开(公告)号：JPS62178027A
公开(公告)日：1987-08-05
申请号：JP1774386
申请日：1986-01-31
申请人： IKEGAMI TSUSHINKI KK , JAPAN BROADCASTING CORP
发明人： KOSHIKAWA HISAYOSHI , OKAMURA HIROSHI , MOMOSAWA HIDEAKI , ISHII AKIRA
IPC分类号： G01S3/38 , G01S3/42 , H04B7/26
摘要： PURPOSE:To safely and accurately use a line by automating the initial setting of a picture information transmission line completely between a base station and a mobile station such as an aircraft so as to minimize the line interruption due to a hindrance at the time of a TV radio wave being an azimuth reference and a radio wave of an ordering line are in the arrival range. CONSTITUTION:The direction of a TV radio wave 12 from a transmission antenna 11 of a TV broadcast station 10 is found via a direction finder antenna 21 of a helicopter station 20, and a picture information transmission antenna 22 is directed to a base station 60 to send a test signal. Further, the station 20 sends an azimuth command to the station 60 via an ordering line whip antenna 23, the station 60 receiving command directs a picture information reception antenna 62 in the direction of antenna 22 to set a picture information line 2. Then the station 60 switches the mode into the automatic tracing, the signal representing the line setting end to the station 20 through the ordering line 1 and the station 20 switches the mode of the antenna 20 to the automatic direction. Then the line interruption due to a fault within a prescribed range is minimized and the utilizing efficiency of the line is improved.

8. 发明专利

JPH07303122A QPSK MODULATOR FOR DIGITAL SIGNAL 失效
公开(公告)号：JPH07303122A
公开(公告)日：1995-11-14
申请号：JP9625194
申请日：1994-05-10
申请人： JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI , NAKA TAKASHI
IPC分类号： H04L27/20
摘要： PURPOSE:To obtain the QPSK modulator for a digital signal from which a high power QPSK wave is obtained without any spread in a side band. CONSTITUTION:Since/cosine wave generating circuits 1-4 generate sine wave and a cosine wave depending on a received digital signal, carriers whose phases differ by 90 deg. are multiplied by multipliers 5-8 respectively and the products are added by adders 9-10. Thus, two carriers subject to phase modulation whose amplitude is constant and whose phase differs by 180 deg. are obtained and after they are amplified by separate saturation power amplifiers 13, 14, the amplified signals are added by an adder 16.

9. 发明专利

JPH0715226A SUPERHIGH BUILDING UTILIZING ENTIRE BUILDING AS ANTENNA 失效
公开(公告)号：JPH0715226A
公开(公告)日：1995-01-17
申请号：JP17208793
申请日：1993-06-21
申请人： TAISEI CORP , JAPAN BROADCASTING CORP
发明人： NISHIMURA MASAHIRO , ISHII AKIRA , OKAMURA HIROSHI , FUJIWARA SHINICHI , OTANI MAKOTO
IPC分类号： E04H12/12 , H01Q1/44
摘要： PURPOSE:To facilitate antenna construction, to increase the valueadded of the building and to effectively utilize the land by arranging a conductor along the height-wise direction of the entire building and radiating or absorbing radio waves with the conductor while using that conductor as an antenna. CONSTITUTION:Wire-shaped conductors 4 as antennas are vertically fitted to four outer wall surfaces 3 perpendicular to a land 2 of a superhigh building 1 in the state of being insulated from the outer wall surfaces 3. An antenna base 5 is provided on the outer wall surface 3 in contact with the land 2 and insulated from the lower edge part of the conductor 4 by insulator 6. The antenna base 5 is grounded under the building by a ground line 7. When radiating radio waves, a voltage is impressed between the conductor 4 and the antenna base 5. Thus, the radio waves are radiated from the conductors 4 to the four directions of the superhigh building 1. When receiving radio waves, the radio waves are absorbed from the four directions by the conductors 4.

10. 发明专利

JPH0397385A TWO-WAY DUPLEX COMMUNICATION METHOD THROUGH SATELLITE 失效
公开(公告)号：JPH0397385A
公开(公告)日：1991-04-23
申请号：JP23270189
申请日：1989-09-11
申请人： JAPAN BROADCASTING CORP
发明人： OKAMURA HIROSHI
IPC分类号： H04N7/14 , H04B7/15 , H04N7/08 , H04N7/081 , H04N7/10 , H04N7/20
摘要： PURPOSE:To simultaneously execute two-way communication for interconnection through a satellite by mixing received communication carriers from the transmitting side and the receiving side of a picture signal as keeping a prescribed level difference, and trasnsmitting the mixed communication carrier toward, at least, the transmitting side and the receiving side of the picture signal. CONSTITUTION:A demodulated OW carrier in the antenna input of a picture signal transmitting station is sent intermittently only during the first half of a horizontal scanning period, and on the other hand, the demodulated OW carrier in the antenna input of a picture signal receiving station is sent continuously by an OW carrier level about 10 db lower than the OW carrier level at the picture signal transmitting station. The receiving part of a broadcasting satellite 17 mixes both as keeping the prescribed OW carrier level difference of about 10 db, and returns the mixed carrier to both the transmitting and the receiving ground stations by carrying it on the microwave of the outgoing circuit of 12 GHz, for instance, by superposing it on a picture signal transmission band through TWT amplifier similarly to at outgoing the picture signal transmitting station.

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