Masahiko Tsuruta

High performance VTR based on the S-VHS format

A brief overview is presented of the S-VHS videotape recorder (VTR) format. This format features horizontal resolution of about 420 lines, surpassing the performance of previously available household VTRs. FM frequency allocation for the S-VHS format is 5.4 MHz at the synchronizing signal peak to 7.0 MHz at the white peak; the carrier frequency is 2.6 MHz at the white peak level. The frequency deviation has been expanded from the 1.0 MHz of conventional VHS to 1.6 MHz. The authors discuss the resulting picture-quality improvement due to the higher carrier frequency used (2.6 MHz) along with the circuitry and the separate Y/C (luminance and chrominance) inputs and outputs used with this format. >

New system "W-VHS" VCR for multi purpose recording including HDTV

The W-VHS system has been developed on the basis of the VHS format as the specification for the next generation multi-purpose consumer VCR. The W-VHS system utilizes improved metal tape and a new recording method for recording and playing back both conventional TV and HDTV broadcasts. The article discusses the essential points of the W-VHS specifications and the signal processing technology. >