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參數資料
| 型號： | W9961CF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 消費家電 |
| 英文描述： | H.263/H.261 Video Codec |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP208 |
| 封裝： | 28 X 28 MM, 2.60 MM HEIGHT, PLASTIC, QFP-208 |
| 文件頁數： | 7/65頁 |
| 文件大小： | 344K |
| 代理商： | W9961CF |
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W9961CF
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1 GENERAL DESCRIPTION
The W9961CF is a highly integrated single chip video codec provided by Winbond Electronics Corp.
The W9961CF performs video compression and decompression fully compliant with ITU-T H.263 and
H.261 standards for video conferencing. Working in conjunction with the high performance 32-bit
RISC, W90220CF, the W9961CF is aimed to provide a complete video solution that supports both
the H.324 international standard for video conferencing over regular telephone lines (Public Switched
Telephone Network, or PSTN) as well as the H.320 international standard for ISDN video
conferencing. Moreover, the W9961CF integrates a high quality NTSC/PAL TV encoder to directly
interface to TV or LCD, eliminating the need for a separate TV encoder for stand-alone or set-top
videophone.
To achieve high performance video coding and decoding, many hardware engines are integrated in
the W9961CF, which perform Motion Estimation and Motion Compensation, Discrete Cosine
Transform (DCT) and Inverse Discrete Cosine Transform (IDCT), Quatization and Inverse
Quantization, Zig-zag Scan, Variable Length Encoding and Variable Length Decoding (VLD), etc. A
high performance 16-bit RISC with 5Kx22 bits program memory (PM) and 1Kx16 bits data memory
(DM) is also integrated for H.263/H.261 coding/decoding control and intelligent frame rate control.
There are three picture formats supported by the W9961 encoder and decoder: sub-QCIF, QCIF, and
CIF. The W9961CF, when operated at 70 Mhz clock frequency, is capable to encode/decode sub-
QCIF, QCIF, or CIF at 30 fps.
The W9961CF can accept NTSC or PAL video, square, or rectangular pixels, and convert to sub-
QCIF, QCIF, or CIF format. A two-dimensional noise reduction filter is integrated to reduce noise and
improve coding efficiency. Built-in cropping window control and arbitrary scaling in both the horizontal
and vertical directions can serve as the digital pan and zoom over a user-specified region for camera
control.
In the video post-processing, the W9961CF supports two movable and arbitrarily scaleable windows
with picture-in-picture (PIP) feature for remote and local view video. A built-in post deblocking filter is
used to reduce visible artifacts of remote view from video compression. The local view video can be
mirrored or unmirrored. A display controller is built-in with 4-/8-/16-bit color modes for background or
on-screen-display (OSD). A high quality NTSC/PAL TV encoder is also integrated to directly interface
to TV or LCD.
An on-chip DRAM controller is used to interface to SDRAM or EDO DRAM through 32-bit data bus.
The W9961CF is a 3.3 V device with TTL-compatible 3.3 V or 5.0 V I/O, and is packaged in 208-pin
PQFP.
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