What is a HD set-top box?

Tag: Set Top Box

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The basic function of the Set Top Box is to receive digital TV programs. The tuning module receives the RF signal and downconverts it to an IF signal, then converts it into a digital signal, and then sends it to the QAM demodulation module for demodulation and outputs the MPEG transmission stream. Row or parallel data. The demultiplexing module receives the MPEG transport stream and extracts PES data of a program, including video PES and audio PES. The video PES is sent to the video decoding module, the MPEG video data is taken out, and the MPEG video data is decoded, and then output to the PAL/NTSC encoder, encoded into an analog television signal, and then output through the video output circuit. The audio PES is sent to the audio decoding module, the MPEG audio data is taken out, and the MPEG audio data is decoded, and the PCM audio data is output to the PCM decoder, and the PCM decoder outputs a stereo analog audio signal, which is output through the audio output circuit. Cable digital set-top boxes can support almost all broadcast and interactive multimedia applications, including digital TV broadcast reception, EPG, NVOD, PPV, software online upgrades, data broadcasting, Internet access, e-mail, IP telephony, VOD and more.

The HD set-top box is a set-top box capable of receiving digital high-definition signals. It is mainly divided into two types: terrestrial high-definition set-top boxes and wired high-definition set-top boxes. Of course, there are products that combine these two receiving methods. The ground HD set-top box can receive wireless ground HD signals, and the wired HD set-top box can receive wired digital HD signals. As a high-definition set-top box, it must provide an HDMI output interface that can receive and output HD signals above 720P.