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VP2615

Mitel Networks Corporation
Part Number VP2615
Manufacturer Mitel Networks Corporation
Description H.261 Decoder
Published Apr 16, 2005
Detailed Description VP2615 H.261 Decoder Supersedes January 1996 edition, DS3479 - 3.0 VP2615 DS3479 - 4.0 June 1996 FEATURES DESCRIPTIO...
Datasheet PDF File VP2615 PDF File

VP2615
VP2615

Overview
VP2615 H.
261 Decoder Supersedes January 1996 edition, DS3479 - 3.
0 VP2615 DS3479 - 4.
0 June 1996 FEATURES DESCRIPTION The VP2615 decoder forms part of a chip set for use in video conferencing and video telephony applications.
It conforms to the CCITT H261 standard, and will decode data coded with full or quarter CIF resolution at frame rates up to 30 Hz.
It accepts run length coded coefficients which have already been error corrected and Huffman decoded, and produces multiplexed YUV data in macro block format after a pipeline delay of two MacroBlocks.
As shown in Figure 1, other devices in the chip set then convert this data into full resolution, component or composite, video.
The incoming run length coded data is converted to individual coefficient values in the correct order.
Data reconstruction is then performed on a block by block basis by multiplying the quantized coefficients with the original quantization value, and then applying the inverse cosine transform.
In the inter frame mode this data is then added to the motion compensated block from the previous frame.
This block can be passed through a low pass filter when required.
A frame store controller produces addresses which allow the best fit block to be read from the frame store, and which also allow the store to be updated with reconstructed data.
Refresh cycles are generated when necessary.
s s s s s s Inputs run length coded transform data Outputs 8 bit pixels in YUV block format Up to full CIF resolution and 30 Hz frame rates Supports motion compensation with up to 15 pixel movement On chip frame store controller 100 pin QFP package ASSOCIATED PRODUCTS s s s s s VP510 Colour Space Converter VP520S Three Channel Video Filter VP2611 Integrated H261 Encoder VP2612 Video Multiplexer VP2614 Video Demultiplexer SYSTEM CONTROLLER USER INTERFACE H261 BIT STREAM VP2614 VIDEO DEMUX RLC DATA VP2615 VIDEO DECODER FRMOUT VP520 3 CHANNEL VIDEO FILTER ADR DATA Y/CR/CB VP530 NTSC/PAL ENCODER COMP N...


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