The EDTV-II intends for a wider aspect ratio and higher picture and sound quality. For enhancing the picture quality, horizontal bandwidth extension of the luminance and chrominance signals is being studied. By using a model of the broadcasting network, this paper simulates waveform responses of the chrominance signals when extending their horizontal bandwidth. As the result, the waveform characteristics of the chrominance signal of the EDTV-II are shown under several conditions.
The 12 channel PCM sound broadcasting receiver for a multichannel PCM sound satellite broadcasting system has been developed. This receiver is cost-effective applying existent popular broadcasting satellite parts. Technological advantages include MSK coherent demodulator with baseband receiving filter, unique digital AFC circuit and demultiplexer with original bit-counting frame synchronization circuit. All the experimental results show excellent bit error rate performance, the degradation from the theoretical value is less than ldB. The receiver is confirmed to be reliable enough for commercialization, even in the high speed bit rate multiplexed signal (24.576Mbps).