Isao Nakagawa

High Quality Digital TV With Frame Store Processing

Though the existing TV standard (NTSC) is a highly sophisticated method to transmit a color television signal without a wide frequency bandwidth, it has some intrinsic problems as follows. (1) Cross-luminance (hanging dots) and cross-color interferences These are caused by the incompleteness of a luminance/ chrominance separation. Hanging dots interference is caused by the cross talk of the chrominance signal into the luminance signal. On the contrary, the cross-color interference is caused by the cross talk of the luminance signal into the chrominance signal. (2) Line flickering and coarse scanning line structure These are caused by interlace scanning. Line flickering is very obvious at the edge where the image changes its brightness in the vertical direction. The coarse scanning line structure can be observed in motion pictures very well because they have only 262.5 scanning lines a field.

Development of picture converting system applying an NTSC signal to a wide aspect display

A picture converting system that can fit input signals to a wide-aspect (16:9) display without jitter and skew was developed. The architecture of the converter and a LSI for its hardware implementation are described. In this system, the compression and enlargement for converting the image were done only by the digital signal processing circuits, and some new methods that were suitable for this digital signal processing system were adopted. This system also included features for minimizing the difference of the luminescence decay of a phosphor between the center and the side portions of the display. >

Advanced and Simplified Signal Processing System for VTR and Its High Performance LSI'S

The Video Tape Recorder(VTR) may be the most complex appliance among home electronic appliances. The number of electronic parts used totals more than 1,400 peaces, even many ICs are involved. For this reason, to ensure reliability and performance is difficult in comparison with other home appliances.

New Chrominance Signal Processing LSI for Home VCR

The home VCR is the most complicated home electronic appliance and employs an extremely large number of electronic components. Therefore, with the home VCR, it is difficult to ensure high reliability and consistent performance. This difficulty, however, can be overcome in the most effective way by reducing the number of components employed in the VCR (especially that of active parts) through extensive use of ICs in its circuitry.

Development of HDTV Receiving Equipment Based on Band Compression Technique (MUSE)

It is about sixteen years since the Investigation of High-definition television (HDTV) system was started by NHK (Japan Broadcasting Corporation), and its outstanding picture quality has already demonstrated on various occasions.(1)

Video Signal Processing LSI's Using ION-Implanted Registors for VCR

The home VCR, (especially the portable VCR), is required intensively to be small-sized, of low power consumption and multi-functional. To meet these requirements, we have developed two luminance signal processing LSIs for VCR.