| Summary: | 碩士 === 淡江大學 === 電機工程學系 === 88 === Along with the progress of computer technology, the demand of the quality of image is getting higher and higher. Some digital video technologies, like HDTV (High Definition Television﹚、DVD﹙Digital Versatile Disc﹚ and Videoconference are adopted to achieve this requirement to process large amount of pictures and video images. The MPEG is the compression standards to solve the problem during the process.
Both HDTV (High Definition Television) and DVD (Digital Versatile Disc) need a MPEG-2 Decoder which include three major parts: the MPEG-2 System Decoder, the MPEG-2 Video Decoder and the MPEG-2 Audio Decoder. And the MPEG-2 Bit Streams include three major parts: the data signals, the video signals and the audio signals. The video Signals is sent to MPEG-2 Video Decoder and the audio signals is sent to MPEG-2 Audio Decoder.
The different of the HDTV (High Definition Television) and the DVD (Digital Versatile Disc) is at the system decoder. The program streams are decoded by the system decoder of the DVD(Digital Versatile Disc). And the transport streams are decoded by the system decoder of the HDTV(High Definition Television). The noise rejection of the transport streams is better than the noise rejection of the program streams.
In the thesis, the prog sameram stream and the transport stream will be decoded by the system decoder. We can watch HDTV and DVD at the same box.
We use the VHDL language to implement the circuit of the MPEG-2 System which include of the program streams and the transport streams. We use the tool of the Mus+PlusII to write the VHDL code to the demo board (10K20RC240-3) of the ALTERA company.
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