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发表于 2009-4-17 13:41:03
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CCIR-656 Encoder
from Adaptive Micro-Ware, Inc.
Features
* Delivers high-quality real-time video encoding
* Complies with CCIR656 (BT.656) standard
* Supports 27-MHz, 8-bit parallel data stream
* Combines input video data, calculated reference codes, and generated blanking data
* Provides external timing reference
* Generates NTSC output
* Uses fully synchronous design
Block Diagram
Figure 1 shows a block diagram of the function.
Figure 1. CCIR-656 Encoder Function
Figure 1 shows a block diagram of the function.
Description
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 also identifies 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
(fMAX) Parameter
Setting
LEs (1) I/O Pins
ACEX® 1K -1 94 47 243.90 MHz None
APEX™ 20KE -1 90 47 290.02 MHz None
Note:
1.
LEs = Logic elements |
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