| 摘要 |
An interface apparatus for connecting a system board with a video decoder is provided to inspect the video decoder without deteriorating the performance of the system board by connecting the system board and the video decoder by using two clock signals having different operating frequencies. An interface apparatus(20) for connecting a system board(10) having a system processor to a video decoder(30) includes a first clock signal supply(22), a second clock signal supply(24), a global interface(100), an input image interface(200), and an output image interface(300). The first clock signal supply provides a first clock signal at an operating frequency identical to the operating frequency of the system board. The second clock signal supply provides a second clock signal at an operating frequency identical to the operating frequency of the video decoder. The global interface transmits a global signal for controlling the video decoder from the system board to the video decoder. The input image interface synchronizes an encoded video signal with the first clock signal provided by the first clock signal supply and transmits the synchronized video signal to the video decoder. The output image interface synchronizes a decoded video signal received from the video decoder with the second clock signal provided by the second clock signal supply, synchronizes the decoded video signal with the first clock signal, and transmits the synchronized video signal to the system board. |
