參數(shù)資料
型號： TDA935X
廠商： NXP Semiconductors N.V.
英文描述： TV signal processor-Teletext decoder with embedded m-Controller
中文描述： 電視信號處理器與嵌入式米圖文電視解碼器控制器
文件頁數(shù)： 44/140頁
文件大?。?/td> 570K
代理商： TDA935X
Philips Semiconductors
Preliminary specification
1999 Sep 28
44
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA 935X/6X/8X series
Data Capture
The Data Capture section takes in the analogue Composite Video and Blanking Signal (CVBS), and from this
extracts the required data, which is then decoded and stored in memory.
The extraction of the data is performed in the digital domain. The first stage is to convert the analogue CVBS
signal into a digital form. This is done using an ADC sampling at 12MHz. The data and clock recovery is then
performed by a Multi-Rate Video Input Processor(MulVIP). From the recovered data and clock the following data
types are extracted WST Teletext(625/525),Closed Caption, VPS, WSS. The extracted data is stored in either
memory (DRAM) via the Memory Interface or in SFR locations.
Data Capture Features
Video Signal Quality detector
Data Capture for 625 line WST
Data Capture for 525 line WST
Data Capture for US Closed Caption
Data Capture for VPS data (PDC system A)
Data Capture for Wide Screen Signalling (WSS) bit decoding
Automatic selection between 525 WST/625WST
Automatic selection between 625WST/VPS on line 16 of VBI
Real-time capture and decoding for WST Teletext in Hardware, to enable optimised microprocessor
throughput
Up to 10 pages stored On-Chip
Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page
Table (SPT)
Automatic detection of FASTEXT transmission
Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters
Signal quality detector for WST/VPS data types
Comprehensive Teletext language coverage
Full Field and Vertical Blanking Interval (VBI) data capture of WST data
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