- Enables high-quality real-time video decoding
- Complies with CCIR656 (BT.656) standard
- Supports 27-MHz, 8-bit parallel data stream
- Includes NTSC and PAL inputs
- Identifies active video data type (luma, chroma red, and chroma blue)
- Provides video line synchronization
- Identifies current field
- Uses fully synchronous design
Figure 1 shows a block diagram of the function.
|Figure 1. CCIR-656 Decoder Function|
Click for full detail (19KB)
The CCIR-656 Decoder provides real-time digital video processing that is used effectively for devices and applications including set-top boxes, digital recorders, video conferencing, streaming video, and video security systems.
The CCIR-656 Decoder design can synchronize to the incoming CCIR656 video data stream and generate the timing signals necessary for other blocks to extract the active video field data. It generates output signals that identify the active video data type (luma, chroma red, and chroma blue) available at DATA_OUT. The decoder can also identify the active portions of the video data stream, the current field outputted, and the video format (NTSC or PAL).
Device Utilization and Performance
Table 1 lists the typical device utilization results for the megafunction.
|Table 1. Typical Device Utilization for the Megafunction|
|Target Device||Speed Grade||Utilization||Performance
|LEs (1)||I/O Pins|
|ACEX® 1K||-1||92||32||158.73 MHz||None|
|APEX™ 20KE||-1||91||32||177.12 MHz||None|
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