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VP2612

更新时间： 2024-11-20 22:15:35

品牌	Logo	应用领域
MITEL		复用器
页数	文件大小	规格书
11页	157K
描述
Video Multiplexer

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VP2612 数据手册

VP2612

Video Multiplexer

Supersedes version in June 1995 Digital Video & DSP IC Handbook, HB3923-2

DS3511 - 3.0 June 1996

The VP2612 Video Multiplexer forms part of the Mitel

FEATURES

Semiconductor chip-set for video conferencing, video

telephony, and multimedia applications. This chip set

implements the H261 standard for video compression for line

rates of between 64K and 2M bits per second. With a 27MHz

clock rate full CIF resolution images can be coded at a frame

rate of up to 30Hz.

The device contains all the elements necessary to

convert the run length coded data from the VP2611 source

coder into an H261 compatible bit stream. It also calculates

the differential motion vectors and macroblock addresses

from the absolute values received from the VP2611. These

values are variable length coded, and bit packed for temporary

storage in the transmission buffer. The size of this buffer can

be either 256Kbits or 512Kbits. Data from the transmission

buffer is output through an X21 compatible serial interface,

and consists of frames containing framing bits, data, and the

BCH (511,493) forward error correction code.

The system processor interface is used to write data for

PTYPE, PSPARE, GSPARE, and to select the source of

temporal reference. The interface can also be used to monitor

the pointers into the transmission buffer, so that the buffer

fullness can be controlled using proprietary software

algorithms. In addition to the bus interface, flags are supplied

which indicate the start of each macroblock, each FEC stuffed

frame, the number of bits per picture is reaching the allowable

maximum, and impending buffer overflow.

■

Fully integrated H261 video multiplexer

■

Inputs data direct from VP2611 source coder

Output to X21 line buffers

Line rates from 64kbits/s up to 2Mbits/s

100 Pin Quad Flatpack

ASSOCIATED PRODUCTS

■

VP2611 H.261 Encoder

VP2615 H.261 Decoder

VP2614 Video Demultiplexer

VP520S CIF/QCIF Converter

VP510 Colour Space Converter

Fig. 1. VP2612 Video Multiplexer

12 3 4 5 6 7...11

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与VP2612相关器件

型号	品牌	获取价格	描述	数据表
VP2612CGGPFR	MITEL	获取价格	Video Multiplexer
VP2614	MITEL	获取价格	H.261 Video De-Multiplexer
VP2614CGGPFR	MITEL	获取价格	H.261 Video De-Multiplexer
VP2615	MITEL	获取价格	H.261 Decoder
VP2615CGGGCR	ETC	获取价格
VP2615CGGH1R	MITEL	获取价格	H.261 Decoder
VP2615CGGPFR	ETC	获取价格
VP2BKX	ETC	获取价格	PATCHCORD VIDEO STD 2' BLACK
VP2BLX	ETC	获取价格	PATCHCORD VIDEO STD 2' BLUE
VP2GNX	ETC	获取价格	PATCHCORD VIDEO STD 2' GREEN