CN102014294A - Method for realizing high-definition hand-hold multi-functional digital video broadcasting-cable (DVB-C) detector - Google Patents
Method for realizing high-definition hand-hold multi-functional digital video broadcasting-cable (DVB-C) detector Download PDFInfo
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- CN102014294A CN102014294A CN 201010519798 CN201010519798A CN102014294A CN 102014294 A CN102014294 A CN 102014294A CN 201010519798 CN201010519798 CN 201010519798 CN 201010519798 A CN201010519798 A CN 201010519798A CN 102014294 A CN102014294 A CN 102014294A
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Abstract
The invention provides a method for realizing a high-definition hand-hold multi-functional digital video broadcasting-cable (DVB-C) detector. The detector comprises a mainboard with a high-definition decoding master chip, a keyboard plate, a signal demodulation board and a liquid crystal display (LCD). The method comprises the following steps: inputting a group of digital TV parameters by the keyboard plate, saving the parameters in the mainboard, and dispatching the function of each hardware module by the mainboard to finish detection of line signals. The method provided by the invention is used for checking and detecting signal lines, thereby reducing difficulties of the engineering.
Description
[technical field]
The present invention relates to a kind of digital television techniques field, relate in particular to a kind of method that realizes high definition hand-held multifunctional DVB-C detector.
[background technology]
At present, development along with Digital Television, a large amount of coverings of digital network, according to the difference of region, digital signal has the difference of various kinds, installation is searched and is brought very big difficulty to Broadcast and Television Center, by the common monitoring equipment on the market can only request signal intensity and quality, cannot carry out normal receiving digital signals, watch normal program, to guarantee that whether signal has reached correct index, fails to reduce the difficulty of engineering.And along with the popularizing of high-definition signal, the needs in market, higher to the functional requirement of product, practicality requires stronger.Continuous development in the Digital Television industry, some are single to the functions of the equipments of digital signal detection, quality that can only monitor signal, some parameters such as intensity, can only carry out preliminary monitoring to signal, and monitoring equipment is relatively heavier, volume is quite big, not portable, can not reduce the difficulty of engineering like this.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of method that realizes high definition hand-held multifunctional DVB-C detector, and the investigation that is used for signal line detects, and reduces the difficulty of engineering.
The present invention is achieved in that a kind of method that realizes high definition hand-held multifunctional DVB-C detector, comprises that mainboard, keypad, signal with high definition decoding master chip separate tuned plate and LCD LCDs, it is characterized in that: realize according to following steps:
Step 10, by keypad input set of number video parameter, described Digital Television parameter comprises: frequency, symbol rate, standard, the Digital Television parameter is kept in the described mainboard, mainboard reads the Digital Television parameter is set, and detects the frequency spectrums of organizing each frequency range of signals by the OSD processing module in the mainboard, to the planisphere in each signal more, quality, level intensity, the error rate are analyzed and are shown, come each signal condition of front monitoring front-end;
Step 20, mainboard are separated tuned plate by I2C twin wire universal serial bus and signal and are communicated, the state of demodulation module is set, demodulation module is by the monitoring to front end signal, monitor current signal condition in real time, mainboard and demodulation module real time communication, read the state of each signal, report to the police by the LCD interface display or by sound;
Step 30, mainboard lock stable frequency signal by the condition prompting to input with analysis, the TS data flow of receiving demodulation plate, and change into PES stream, decode by MPEG-2 Video Decoder in the mainboard and the digital audio decoding device in the mainboard, decoded data are shown in the output of LCD LCDs.
The present invention has following advantage: the present invention includes mainboard, keypad, signal with high definition decoding master chip and separate tuned plate and LCD LCDs, earlier by the many groups of keypad input Digital Television parameter, and parameter is kept in the mainboard, mainboard is finished detection to line signal by the function of dispatching each hardware module.The investigation that the present invention is used for signal line detects, and reduces the difficulty of engineering.
[description of drawings]
Fig. 1 is the inventive method schematic flow sheet.
Fig. 2 is a structural representation of the present invention.
[embodiment]
The present invention is further illustrated in conjunction with the embodiments below with reference to Fig. 1, Fig. 2.
A kind of method that realizes high definition hand-held multifunctional DVB-C detector comprises that mainboard, keypad, signal with high definition decoding master chip separate tuned plate and LCD LCDs, sees that Fig. 1 realizes according to following steps:
Step 10, import one group of (can be one group arbitrarily) Digital Television parameter by keypad, described Digital Television parameter comprises: frequency, symbol rate, standard, the Digital Television parameter is kept in the described mainboard, mainboard reads the Digital Television parameter, detect the frequency spectrum of each frequency range of many group signals by the OSD processing module in the mainboard, to the planisphere in each signal, quality, level intensity, the error rate is analyzed and is shown, obtain the signal condition value of many groups, store, can the data after the test be compared, make the state that operating personnel can accurately detection signal, and according to the frequency spectrum of each frequency range, the signal level of each frequency of analysis circuit and quality help investigation and wiring to circuit.
Step 20, mainboard are separated tuned plate by I2C twin wire universal serial bus and signal and are communicated, the state of demodulation module is set, demodulation module is by the monitoring to front end signal, monitor current signal condition in real time, mainboard and demodulation module real time communication, read the state of each signal, report to the police by the LCD interface display or by sound.
Step 30, mainboard lock stable frequency signal by the condition prompting to input with analysis, the TS data flow of receiving demodulation plate, and change into PES stream, decode by MPEG-2 Video Decoder in the mainboard and the digital audio decoding device in the mainboard, decoded data are shown in the output of LCD LCDs by the AV interface.
Detector of the present invention is by mainboard, keypad, and signal is separated tuned plate, and LCD LCDs and charge power supply are formed (see figure 2).Wherein mainboard adopts high definition decoding master chip, and this master chip internal integration MPEG-2 Video Decoder, digital audio decoding device, descrambling module and OSD (screen menu type regulative mode) processing module etc., its energy matching management and Control Software are formed the system management of receiving demodulation and decoding, and the decoding buffer storage of dynamic management decoder, guaranteed quality and performance that product is highly reliable.Its annexation is: the output of described mainboard is connected by the input of AV interface with the LCD LCDs, the input of described mainboard separates tuned plate with signal respectively by I2C twin wire universal serial bus and keypad is connected, and described mainboard input also is connected with charge power supply by the UART serial data bus.
Here being noted that the state that demodulation module is set, is that signal is sampled, quantize, and the locking of signal, intermediate frequency, low frequency carries out conversion processing, forms the signal parameter value that meets international standard.OSD is one deck monochrome or pseudo color captions, is mainly used in user's operation indicating, finishes normal displaying video, further guarantees the accuracy of signal, finishes the basic function of set-top box.
Here be noted that owing to, therefore require detector to have the hierarchical decoding function to finishing key frame, sprite decoding on the Video processing.Because teletext can be added on the key frame with change display function choosing of APHA, this will ask decoder demodulation main picture image and teletext data simultaneously, and very high speed and disposal ability will be arranged.
What deserves to be mentioned is that the USB interface that the present invention can pass through detector detects data and upgrades the Digital Television parameter in the mainboard.The mainboard input also is connected with charge power supply by the UART serial data bus, the state of the monitoring battery that mainboard can be real-time, and state is presented at lcd screen, and have audible alarm battery status, its charge power supply can make detector more perfect.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. method that realizes high definition hand-held multifunctional DVB-C detector comprises that mainboard, keypad, signal with high definition decoding master chip separate tuned plate and LCD LCDs, it is characterized in that: realize according to following steps:
Step 10, by keypad input set of number video parameter, described Digital Television parameter comprises: frequency, symbol rate, standard, the Digital Television parameter is kept in the described mainboard, mainboard reads the Digital Television parameter is set, and detects the frequency spectrums of organizing each frequency range of signals by the OSD processing module in the mainboard, to the planisphere in each signal more, quality, level intensity, the error rate are analyzed and are shown, come each signal condition of front monitoring front-end;
Step 20, mainboard are separated tuned plate by I2C twin wire universal serial bus and signal and are communicated, the state of demodulation module is set, demodulation module is by the monitoring to front end signal, monitor current signal condition in real time, mainboard and demodulation module real time communication, read the state of each signal, report to the police by the LCD interface display or by sound;
Step 30, mainboard lock stable frequency signal by the condition prompting to signal with analysis, the TS data flow of receiving demodulation plate, and change into PES stream, decode by MPEG-2 Video Decoder in the mainboard and the digital audio decoding device in the mainboard, decoded data are shown in the output of LCD LCDs by the AV interface.
2. a kind of method that realizes high definition hand-held multifunctional DVB-C detector according to claim 1 is characterized in that: the USB interface by detector detects data and upgrades the Digital Television parameter in the mainboard.
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| CN 201010519798 CN102014294A (en) | 2010-10-25 | 2010-10-25 | Method for realizing high-definition hand-hold multi-functional digital video broadcasting-cable (DVB-C) detector |
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| CN 201010519798 CN102014294A (en) | 2010-10-25 | 2010-10-25 | Method for realizing high-definition hand-hold multi-functional digital video broadcasting-cable (DVB-C) detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102750207A (en) * | 2011-04-18 | 2012-10-24 | 鸿富锦精密工业（深圳）有限公司 | Motherboard test method and system |
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Application publication date: 20110413 |