With the rapid progress of performance and capacity of HDD, not only small systems such as Digital Disk Recorders but also large systems such as CM Bank systems are available to realize. This paper describes new disk storage systems that have high performance of RAID-3 and high reliability of RAID-6.

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Video retrieval system for video archive center, which control and preserves large amount of video library, is studied. Considering necessary function for video retrieval system, hierarchical recording system has been tested. Hierarchical recording system is a conbination of hard disk drives(HDD) and tape streamer, and can access the top part of program at speed of HDD system and still be able to make system inexpensive with small recording media volume.

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The performance evaluation of a PC coded PR4ML system recorded on two tracks using a spinstand is studied. It is compared with those of 16/17(0,6/6) coded E^2PR4ML system and a (1,7)RLL coded PR(1,2,1,-1,-2,-1)ML system. The results show that the proposed system exhibits the best BER performance among those systems.

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MTR(maximum transition run)code is highly rated under the recent demand on higher density recording. In this paper, we introduce two-dimensional simplest MTR code with trellis function and investigate the effectiveness of the combination with TCPR4(trellis coded partial response 4) ML and this code, where the simplest means that all of more than three continuous level transition pattern are removed from the write-in waveform. The results show that bit error rate with this combination can hold the superiority over the combination with conventional PRML and this code.

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Double layer perpendicular recording system has attracted special interest as the next generation recording technique. Although the waveform shape of read-back signal on this system is usually modeled by the integrated form of Lorentian pattern which has been widely adopted in the longitudinal recording system, the validity of this model hasn't been confirmed yet. In this paper, we investigate another model, so called Sigmoid pattern, which has recently been proposed, and compare with conventional model on the linearity to the variation of recording density. The results show that mean square error between experimental data and the calculated waveform by models can be reduced by the new model through wide range recording densities.

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The PRML system for perpendicular magnetic recording using a double-layered medium and an MR head are studied. The required SNR of (1,7)RLL coded PR(1,2,3,2,1)ML and PR(1,2,3,3,2,1)ML systems is obtained and compared with that of a conventional 16/17(0,6/6)coded EPR4ML system. The result shows that PR(1,2,3,3,2,1)ML system has the best performance in high density recording

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Guided Scrambling(GS) is used for the control of runlength within code blocks, such as d or k, as well as for DC component suppression. It is a coding technique which archive a code rate very close to the channel capacity. Typically technique uses a conventional operation or GF(Galois field) addition. In this paper, we propose a hardware configuration using ROM tables and also compare the ROM table sizes of both operations.

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This paper presents an image-processing method for detection and removal of scratch distortions from corrupted old film sequences. The film scratch distortions appear like vertically line with constant intensity continuously over successive several frames. Taking the property of the scratch distortion into account, we form the scratch detection/removal method with morphological image-processing techniques.

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This paper deals with correction of image flickers in old film sequences. We present four different types of image-flicker model, and develop several methods for correction of image flickers. The experimental simulations demonstrate that the most complex flicker-model works very for all the types of image flicker.

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Remote Medical Diagnostic System considered here is a visual Communication system which enables a doctor to diagnose an invalid at remote terminal through a TV camera and monitor. For this kind of system, faithful color reproduction capability is required. This paper describes a faithful color reproduction system which takes advantage of conversion function.

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In the former report, we suggested about the possibility of the white light source reconstruction in case of electro-holography using liquid crystal device. This time, we dealt with narrowing the spectral band width of the light source in order improve the characteristics of the reconstruction image.

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Holographic stereograms (HSs) have been used as three-dimensional displays from nearly 30 years ago. For HS synthesis, a method of generating sequential perspective images based on OpenGL programming was proposed in this paper. The Usefulness of this method was presented by reconstructing images of a teapot and a cube from synthesized HSs.

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This paper addresses a new 3D image representation in multimedia ambiance communication based on depth map. It aims at the construction of multimedia ambience based on generic photo-realistic images. We propose a new scheme of acquisition 3D image representation using depth map and texture.

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The HDTV camera was put aboard the space shuttle Discovery that went into orbit and short realistic scenes of the earth. We produced 3-D images from those 2-D pictures, as part of the attempt to explore of the possibility of 3-D program representation. A pair of stereoscopic images were created from the same continual sequence of the earth's moving pictures. Resulting stereoscopic HDTV provides extremely realistic stereoscopic earth images by fully taking advantage of the high picture quality of HDTV.

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This paper describes features and outlines of a power amplifier for terrestrial digital broadcasting

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This paper describes a digital delay line for Single Frequency Network of digital television broadcasting with OFDM. To delay signals, memory devices are used, so we can adjust signal delays exactly

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We have developed a delay profile measurement set for digital television broadcasting with OFDM. To calculate profiles, Scattered Pilots that are added in OFDM Symbols are used.

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Practical field experiments for digital terrestrial television broadcasting were carried ARIB from November 1998 to March 1999. This paper describes the results of practical field experiments for stationary reception. The results show that required minimum field strength for 99% of correct reception location rate is about 57dBμV/m in the case of 64QAM with coding rate of 7/8.

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This paper describes the results of field transmission experiments for mobile reception carried out by ARIB. Experimental results show that the required minimum field strength is 51dBμV/m for 99% of correct reception time rate in the case of DQPSK with coding rate of 1/2.

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This paper describes the results of field transmission experiments for fixed and mobile reception using two SFN stations conducted by ARIB in February this year. In the case of optimum transmission timing of two SFN stations, preferable results were obtained. However, in the case of transmission timing for relay station, it was difficult to receive correctly within two SFN stations because delay time from main transmitter to another SFN transmitter become longer than guard interval. Location of relay station, transmission mode etc. must be taken carefully to implement SFN.

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Field transmission experiments using relay transmitter for digital terrestrial broadcasting were carried out by ARIB in winter, 1999. This paper describes the results of the field experiments. In each relay station, the signal was degraded due to a coupling from transmitting antenna to receiving antenna. If 64QAM-OFDM with coding rate of 7/8 is the case of relay, the amount of C/N degradation can be held down to 2.0dB or less with securing 15dB or more of return D/U.

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This paper describes a mobile reception performance of digital terrestrial TV broadcasting Indoor experiments using four propagation models, three Rayleigh fading models and a Rician fading model, are performed and transmission characteristics for several time interleaving lengths are estimated. The results show that the time interleaving of eight-cell length gets enough performance on mobile reception. Furthermore, the C/N to obtain no error after RS decoding is 3dB higher than the C/N to obtain BER=2×10^<-4> after Viterbi decoding.

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We developed three new RF ICs for Digital Terrestrial Broadcasting TV Receiver. The TA1305FN is two Band(VHF, UHF) Mixer IC. The TA1308FN has Low Phase Noise OSC and PLL synthesizer. The TA1311FN is Low Frequency Converter IC for "OFDM" Demodulator. It all is a bipolar single chip solution.

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The Digital Terrestrial Television Broadcasting(DTTB) will start in 2000 in Japan. In the DTTB, the orthogonal Frequency Division Multiplex(OFDM) is used. The OFDM is brand new technology, then many kind of in-door tests and verification tests in field are carried out to realize DTTB, But the time schedule was very tight so some tests are omitted. To shorten the period of development, we have made a programmable signal processing system using CPU and Field Programmable Gate Array(FPGA) that controlled by Graphical Use Interface(GUI). In this paper the outline of the programmable signal processing system is mentioned, and some examples applied for the OFDM are also described.

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Digital Terrestrial Television Broadcasting(DTTB) System is based on Orthogonal Frequency Multiplex(OFDM) method. As the DTTB system uses the various techniques, for example, the guard intervals, time or frequency intervals and so on, it is expected to have mobile reception capability. However, in the environments which have serious frequency selective fading or in the low signal level areas, the reception characteristics will be degraded. In this paper, we discuss about the mobile reception characteristics of the OFDM signals by using diversity reception technique.

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We developed a ISDB-T narrow band receiver. This receiver can detect a part of wide band ISDB-T and narrow band ISDB-T. This receiver can receive audio services. We use a analog TV tuner whose PLL IC is exchanged to low phase noise one . We use CXD8714 which is a channel decoder LSI for DVB-T. The size of narrow band receiver is as same as a Digital CS IRD.

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Broadcasting services and receiver functions for presentation are discussed in a downloadable software broadcasting system, where these functions are flexibly changed without replacing the receiver hardware by functional software transmitted over the broadcasting channel.

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This contribution reports the test results of data broadcast for super high speed objects. The tests show, at TOKAIDO SHINKANSEN speed of 200km/hr was available. Room tests show that data service for airplane is possible.

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We devised a method of Multiplexing digital data into the AM signal. The characteristics of this method is in keeping compatibility with existing AM receivers, and easy to separate and demodulate the digital data.

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This paper describes our study on an analyzer system for BS digital broadcasting in Japan. When BS transmission signal could not received, we should consider and analyze MPEG-TS signal and TMCC signal. We proposed analyzing method of these signal.

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We carried out the experimental confirmation to understand the influence given by the Burst Symbol for the Japanese BS Digital Broadcasting(ISDB-S). As the result, we studied the Burst Symbol had better be the Unique Pattern constructed by the 9^<th> Ordered PN to get good performances.

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Information Broadcasting is an information service provided with highly structured information on digital broadcasting system. In Information Broadcasting, Program digest viewing by users is one of important applications. In this paper, we describe a prototype of digest making system for baseball programs.

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Information Broadcasting is an information service provided with highly structured information on digital broadcasting system. In this paper, we describe the receiver architecture of information Broadcasting and the characteristics of its functions. We also describe the prototype system to be developed.

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The issue on TV formats, i.e., "interlaced scan vs. progressive scan", is an urgent topic for the future TV systems, and the fusion of, or, the easy conversion between them should be eagerly purposed. For this purpose, the use of 30P pictures was proposed as "common intermediate scan". In this paper, the limit of allowable vertical resolution in each format is psycophysically, with various vertical motion.

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It is very important to reduce the number of bits for motion vectors(MV) in the MPEG for higher picture quality and also to reduce their search steps for its easy implementation. In this paper, the meaningless components of MVs, which have been thought to be suppressed, are utilized positively for the same purpose mentioned above, through the use of the same type of penalty functions. Computer simulation shows much improved characteristics.

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This paper describes our research on synchronization of real-time transportation of various media signals(compressed video and audio, etc.) between different clock networks. When reference clocks is different from each other, we must convert bit-signal synchronization at the point where difference network is connected. We will specifically consider MPEG Transport Stream in this paper. In order to adjust the gap of different network clocks, we have tried to delete DCT Coefficient Forcibly for reduction of video-stream bit-rate

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Using Bitstream for transmission in broadcasting station has an advantage from the point view of running costs. MPEG Bitstream Operation is a required in order to realize such a "Bitstream Studio". This paper focuses on the MPEG bitstream Operation in a broadcasting station, especially, "Bitstream Switching" and "Bitstream Superimpose". These techniques are found to provide the good picture quality for practical use, and they encourage the possibility to realize the "Bitstream Studio".

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We have developped MPEG-2 codec which will be used for the research and developments in the experimental relaying transmission network of the terrestrial degital broadcasting. In this paper, outline of our equipments and newly introduced function are shown.

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In order to investigate the optimal number and position of cameras in a multi-viewpoint 3-D video system, it is necessary to specify the most general figures and locations of picked-up objects. We selected five pairs of standard stereoscopic Hi-Vision images as the most general ones, and analyzed the statistical characteristics of contours of objects in them.

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We have developed Digital8 camcorder format, which enables digital video and audio recording on Hi8-8mm tapes. and the recorded data structure is approximately same as DV, so the picture and sound have extremely high quality. For the backward compatibility, we have also developed automatic detection system of Analog8/Digital8.

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A Network MPEG Camera which can be directly connected to a network for real-time digital video transmission has been developed. The camera works under TCP/IP protocol and accepts remote control commands from PCs. The command set of the camera includes record/pause command, mode change command, zoom control command, bit rate control command, and so on. The bit rate of MPEG video bit stream can be changed even during the data transmission and encoding.

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We have developed a new video camera system using MPEG-4 video codec. We realized small and low power consumptive video camera having a lot of features, with two newly developed LSIs. To improve relationship with PC, we have adopted IC memory as a recording media and ASF as file format.

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An MPEG-4 camera was developed, which is the first consumer product using the MPEG-4. This camera is suitable for the Internet by adoption of ASF file format. An ASF file recorded by this camera can be sent via the Internet and put on Home Page without any modifications.

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We have developed a digital signal processing LSI for digital still cameras with over 1M-pix CCDs. A camera signal processor, detectors for auto focus/exposure/white balance control, JPEG/MPEG processors, a video encoder, and a resolution converter are fully integrated. The LSI is used in DSC-F55K, a digital still camera product, realizing high performance with low power and compact size.

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We developed a digital video synchronous pulse separator which is suitable for digital signal processor for video cameras. The separator generates a stable horizontal synchronous signal by using some parameter of phase and period length which are compared with external input video signal.

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We have developed the new digital imaging processing LSI for the high-end security camera system. This LSI Contains the camera signal processing circuit for the mosaic-color-filtered CCD, the image information detecting circuit for the AE and the AWB corresponding to the Luminance flicker reduction and the color flicker reduction, the motion detecting circuit, the timing pulse generator for driving the CCD, and the sync signal generator. This LSI realizes the small-sized security camera with superior functions and high performance.

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