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參數(shù)資料
| 型號(hào)： | TW9903 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TW9903 ? Multi-standard Video Decoder With High Quality Down Scaler |
| 中文描述： | TW9903？多標(biāo)準(zhǔn)視頻解碼器，高品質(zhì)下倍線器 |
| 文件頁(yè)數(shù)： | 5/74頁(yè) |
| 文件大小： | 630K |
| 代理商： | TW9903 |
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TW9903
TECHWELL, INC.
5
REV. 0.92 ( B )
06/02/2002
Overview
Techwell’ s TW9903 is a high quality NTSC/PAL/SECAM video decoder that is designed for
multimedia applications. It uses the mixed-signal 3.3V CMOS technology to provide a low-power
integrated solution.
The TW9903 analog front-end is equipped with three separate analog channels that enable it to
accept two possible analog video signal standards: composite or S-video. All channels include an
analog multiplexer (MUX) for maximum flexibility in software controlled input selection. It is possible
to connect up to four composite inputs at one time and allow the software to switch between them.
Alternatively several combinations of composite inputs and S-Video component inputs may be
switched under software control. (Four input channels of any format can be accommodated with
but there is a maximum of 2 S-Video inputs and 2 component inputs.)
The front-end contains all the necessary circuits to simplify the system design. AGC and clamping
circuits, and three 8bit analog-to-digital converters (ADCs) convert inputs into digital signals for
processing.
The TW9903 uses proprietary adaptive comb filter for chroma and luma separation to achieve high
video quality. The image enhancement uses nonlinear methods to enhance picture sharpness
with little overshoot.
The advanced synchronization processing can produce stable pictures for non-standard signal
such as those produced by VCR during fast forward, rewind or pause.
The high quality scaler uses multi-tap poly-phase decimation filter to reduce aliasing effects. It can
be programmed to scale-down the output picture to an arbitrary ratio with cropping.
The TW9903 supports flexible pixel interface. It outputs YCbCr (4:2:2) data stream over 8bit or
16-bit data path. The output is VMI 1.4 compatible.
A 2-wire serial MPU interface is used to simplify system integration. All the functions can be
controlled through this interface.
Analog Front-end
The analog front-end converts analog video signals to the required digital format. There are three
analog channels with clamping circuits and ADCs. The Y channel has 4-input multiplexer, and a
variable gain amplifier for automatic gain control (AGC). Is four inputs are identified as MUX0,
MUX1, MUX2 and MUX3. The C_Pb channel has 2-input multiplexer. Its two inputs are identified
as C_PbIn0 and C_PbIn1. The C_Pb channel is internally clamped to the zero level of the bipolar
input source when enabled.
Video Source Selection
All analog signals should be AC-coupled to these inputs.
The Y channel analog multiplexer selects one of the four inputs MUX[0-3]. MUX[0-3] can be
connected to composite video inputs or the Y signal of an S-Video or component input. When
decoding a S-Video input, the Y signal should connect to one of the MUX inputs and the C signal
to C_PbIn0 or C_PbIn1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TW9903-FB | 功能描述:IC DECODER VIDEO NTSC/PAL/SECAM RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TW9903-MB | 功能描述:IC DECODER VIDEO NTSC/PAL/SECAM RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TW9903-MBS | 功能描述:IC NTSC/PAL/SECAM DECODR 100PQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TW9905-FD | 功能描述:IC DECODER VIDEO NTSC/PAL/SECAM RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| TW9905-MD | 功能描述:IC DECODER VIDEO NTSC/PAL/SECAM RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉(zhuǎn)換器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 26/Apr/2011 標(biāo)準(zhǔn)包裝:1 系列:- 類型:編碼器 應(yīng)用:DVB-S.2 系統(tǒng) 電壓 - 電源，模擬:- 電壓 - 電源，數(shù)字:- 安裝類型:- 封裝/外殼:模塊 供應(yīng)商設(shè)備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
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