參數(shù)資料
型號： 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
文件頁數(shù)： 9/74頁
文件大小： 630K
代理商： TW9903
TW9903
TECHWELL, INC.
9
REV. 0.92 ( B )
06/02/2002
Video Format support
TW9903 supports all common vdeo formats as shown in Table 1. The video decoder needs to be
programmed appropriately for each of the composite video input formats.
Table 1. Video Input Formats Supported by the TW9903
Format
Lines
Fields
Fsc
Country
NTSC-M
525
60
3.579545 MHz
U.S., many others
NTSC-Japan
(1)
525
60
3.579545 MHz
Japan
PAL-B, G, N
625
50
4.433619 MHz
Many
PAL-D
625
50
4.433619 MHz
China
PAL-H
625
50
4.433619 MHz
Belgium
PAL-I
625
50
4.433619 MHz
Great Britain, others
PAL-M
625
60
3.575612 MHz
Brazil
PAL-CN
625
50
3.582056 MHz
Argentina
SECAM
625
50
4.406MHz
4.250MHz
France, Eastern Europe,
Middle East, Russia
PAL-60
525
60
4.433619 MHz
China
NTSC (4.43)
525
60
4.433619 MHz
Transcoding
Notes: (1). NTSC-Japan has 0 IRE setup.
Component Processing
Luminance Processing
The TW9903 adjusts brightness by adding a programmable value (in register BRIGHTNESS) to
the Y signal. It adjusts the picture contrast by changing the gain (in register CONTRAST) of the Y
signal.
The TW9903 video decoder also performs a coring function. It can force all values below a certain
level, programmed in the Coring Control Register, to zero. This is useful because human eyes are
sensitive to variations in nearly black images. Changing levels near black to true black, can make
the image appears clearer.
Gamma
Y Gamma function is provided to compensate for different display types. Four pre-programmed
Gamma levels can be selected through registers.
Sharpness
The TW9903 also provides a sharpness control function through control registers. It povides the
control in 16 steps up to +12db. The center frequency of the enhancement curve is around 3.5Mhz.
It also provides a high frequency coring function to minimize the amplification of high frequency
noise. The coring level is adjustable through the Coring Control register. The same function can
also be used to soften the images. This can be used to provide noise reduction on noisy signal.
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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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