CN102404604B - Apparatus for measuring cable digital television signals - Google Patents
Apparatus for measuring cable digital television signals Download PDFInfo
- Publication number
- CN102404604B CN102404604B CN201110402928.9A CN201110402928A CN102404604B CN 102404604 B CN102404604 B CN 102404604B CN 201110402928 A CN201110402928 A CN 201110402928A CN 102404604 B CN102404604 B CN 102404604B
- Authority
- CN
- China
- Prior art keywords
- signal
- digital television
- television signals
- module
- cable digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides an apparatus for measuring cable digital television signals, which comprises a power supply module, an audio/video input output module, a CPU (Central Processing Unit), a memory module and a signal inputting and decoding module; the power supply module is used for providing power for other modules of the apparatus for measuring the cable digital television signals; the audio/video input output module comprises a 5150IC (integrated circuit), a display screen for displaying a video signal and an RCA (Radio Corporation of American) interface for receiving the external audio/video signal and transmitting the audio/video signal to the 5150IC; the signal inputting and decoding module comprises a tuner and a demodulator which are connected by a signal; the tuner is used for receiving a tuning signal and transmitting the tuning signal to the demodulator; the demodulator is used for calculating various parameters of the tuning signal, searching and decoding the tuning signal and transmitting the tuning signal to the CPU; and the CPU is connected with the demodulator and the 5150IC by signals through an IIC (Inter-integrated Circuit) bus. The apparatus for measuring cable digital television signals has the advantages of wide application and convenient use.
Description
Technical field
The present invention relates to digital television techniques field, be specifically related to a kind of for digital catv signal being measured, install, detected the apparatus for measuring cable digital television signals of debugging and portable TV reception.
Background technology
Society is along with cable digital TV is universal, and the number of users of cable digital TV increases sharply, the thing followed, and the debugging to digital catv signal, installs, and measures and becomes extremely hard work.And the adjusting instrument that numerous staff use, for example field intensity meter, is simply equipped, and weak effect can not be intuitively, visual display measurement result.
Summary of the invention
In view of this, be necessary the problem of mentioning for background technology, a kind of measure signal intensity is accurately provided, quality, BER, the exact value of MER. frequency spectrum that can also display full frequency band, and the planisphere of each program or frequency, can also directly search and watch the apparatus for measuring cable digital television signals of all cable digital TV programs.
The present invention is achieved by the following technical solutions:
A kind of apparatus for measuring cable digital television signals, it comprises power module, audio frequency and video input/output module, central processing unit, memory module, signal input and decoder module, described power module is used to other module for power supply of described apparatus for measuring cable digital television signals, and described audio frequency and video input/output module comprises that a 5150IC, a display screen for display video signal and one are for receiving outside audio-video signal and this audio-video signal being transferred to the RCA interface of described 5150IC; Described signal input comprises with decoder module tuner and the demodulator that signal is connected, described tuner is used for receiving harmonic ringing and this harmonic ringing is transferred to described demodulator, described demodulator is for calculating the various parameters of described harmonic ringing, and harmonic ringing is searched for to decoding, transfer harmonic ringing to TS and spread into described central processing unit; Described central processing unit is connected with described demodulator and described 5150IC signal by iic bus, and described central processing unit solves audio frequency and video television programme data for the TS stream from receiving, and outputs to described 5150IC by CVBS interface; Described memory module is connected with described central processing unit signal.
Described apparatus for measuring cable digital television signals also comprises USB interface.
Described 5150 IC arrive described display screen by vision signal by BT656 interface output display.
Described memory module comprises a synchronous DRAM and a FLASH module, and the frequency of described synchronous DRAM is 256MB, and the frequency of described FLASH module is 32Mb.
Described memory module comprises a synchronous DRAM, and its frequency is 256MB.
The range of receiving of described tuner is 44MHZ-864MHZ, and signal strength signal intensity identification range is-65dBm-25dBm.
The external 12.6V power supply of described power module.
Described power module comprises an external mains switch, carries macro-energy storage battery, also comprises a short-circuit protection circuit.
Compared with prior art, the present invention possesses following advantage:
The present invention is measure signal intensity accurately, quality, BER, MER, the signal parameters such as SNR. and frequency spectrum that can also display full frequency band, and the planisphere of each program or frequency, can also directly search and watch all cable digital TV programs; In addition, can also be to recording program and playback, identification USB flash disk, plays the audio frequency in USB flash disk, and picture, by USB flash disk automatic software update, uploads save data, preserves screenshot capture; And, can also obtain signal demodulation complete, original data transmission stream (TS) afterwards, for digital television techniques, research staff analyzes and researches.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Embodiment
As shown in Figure 1, the apparatus for measuring cable digital television signals of the embodiment of the present invention comprises power module, audio frequency and video input/output module, central processing unit (Central Processing Unit, CPU), memory module, signal input and decoder module.
Described power module (POWER BLOCK), is used to other module for power supply of described apparatus for measuring cable digital television signals, and its input voltage is 12.6V, and it comprises an external mains switch, carries macro-energy storage battery; Also comprise a short-circuit protection circuit.
Described audio frequency and video input/output module, comprise a 5150IC, a LCD and a RCA interface, described 5150IC is connected with described RCA interface signal, the audio-video signal of inputting by RCA interface can transfer to described 5150IC, described 5150IC is connected with described LCD signal, and described 5150 IC arrive lcd screen by video by BT656 interface output display.
Described CPU is connected with Demod and 5150IC signal by iic bus.
Memory module, comprise SDRAM (Synchronous Dynamic Random Access Memory, synchronous DRAM) module and a FLASH module being connected with this SDRAM module, described SDRAM module is connected with described cpu signal, its frequency is 256MB, this two module is used for storing whole system software, and start shooting logo, bitmap, also can store frequency list, the rendition list for user.
Signal input and decoder module, comprise tuner (Tuner) and demodulator (Demod) that signal connects, and the range of receiving of Tuner is 44MHZ-864MHZ, signal strength signal intensity identification range-65dBm-25dBm; Tuner and Demod signal connect, and can guarantee measure signal intensity accurately, quality, BER, the exact value of MER. and the frequency spectrum of signal full frequency band shows, accurately draws the planisphere of each program or frequency.
Preferably 3.5 inches of the sizes of described LCD.
First external 12.6V power supply or use the powered battery that carries of described power module, after described mains switch start, CPU is by the 5150IC in the input of iic bus control signal and decoder module (Demod and Tuner) and audio frequency and video input/output module; After Tuner termination enters holding wire, Tuner carries out frequency conversion by frequency changer circuit to signal, obtain intermediate frequency (IF) signal and export described demodulator (Demod) to, Demod carries out after a series of actions such as phase-detection, carrier wave recovery, A/D conversion, channel demodulation and error correction input intermediate-freuqncy signal, demodulate original data stream (TS), and detecting in detail and calculate the various parameters of measured signal, TS spreads into CPU; CPU further solves the television programme data such as audio frequency and video from TS stream, and output to audio frequency and video input/output module by CVBS interface, 5150 IC arrive lcd screen by video by BT656 interface output display, and audio frequency spreads out of by loud speaker, and user can watch program.If carry out frequency spectrum, signal strength signal intensity, BER, MER, the signal parameters such as planisphere are measured, and the software systems of measuring instrument self can be shown to the precise information of obtaining and calculating reflection strictly according to the facts on screen, allow user be convenient to use.
When RCA interface accesses outside audio frequency and video input signal, this equipment can be worked as small-sized TV terminal and be used; In addition, described apparatus for measuring cable digital television signals also comprises one or more USB interface, by described USB interface, can insert USB flash disk, TS code stream is carried out to original recording, person easy to use further researchs and analyses TS stream information, or convert general multimedia form to and record, allow user is arbitrary to be watched in broadcastings such as computer, mobile phones.
By described USB interface, simultaneously can play different multimedia videos, music, photo etc., file format is such as MPEG, MP3, FLV, 3GP, AVI, JPG, BMP, PNG etc.
Described memory module can also comprise and only includes a SDRAM module.
The present invention's apparatus for measuring cable digital television signals is measure signal intensity accurately, quality, BER, MER, the signal parameters such as SNR. frequency spectrum that can also display full frequency band, and the planisphere of each program or frequency, can also directly search and watch all cable digital TV programs; In addition, can also be to recording program and playback, identification USB flash disk, plays the audio frequency in USB flash disk, and picture, by USB flash disk automatic software update, uploads save data, preserves screenshot capture; And, can also obtain signal demodulation complete, original data transmission stream (TS) afterwards, for digital television techniques, research staff analyzes and researches.
The range of application of the present invention's apparatus for measuring cable digital television signals comprises: first for vast cable digital TV staff, be they at commissioning device, the indispensable instrument in installation and maintenance cable TV network; Next is=for vast digital cable customers and fan, there is this portable set, they not only can debug cabled digital signal voluntarily without professional's help, can also as domestic consumer, be used for search watches program, records and preserves program, the grabgraf oneself like, listens to the music etc.; Be exactly the research staff for digital television techniques in addition, as researcher's measuring instrument, aid.
Claims (8)
1. an apparatus for measuring cable digital television signals, it is characterized in that: it comprises power module, audio frequency and video input/output module, central processing unit, memory module, signal input and decoder module, described power module is used to other module for power supply of described apparatus for measuring cable digital television signals, and described audio frequency and video input/output module comprises that a 5150IC, a display screen for display video signal and one are for receiving outside audio-video signal and this audio-video signal being transferred to the RCA interface of described 5150IC; Described signal input comprises with decoder module tuner and the demodulator that signal is connected, described tuner is used for receiving harmonic ringing and this harmonic ringing is transferred to described demodulator, described demodulator is for calculating the various parameters of described harmonic ringing, and harmonic ringing is searched for to decoding, transfer harmonic ringing to TS and spread into described central processing unit; Described central processing unit is connected with described demodulator and described 5150IC signal by iic bus, and described central processing unit solves audio frequency and video television programme data for the TS stream from receiving, and outputs to described 5150IC by CVBS interface; Described memory module is connected with described central processing unit signal.
2. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: described 5150 IC arrive described display screen by vision signal by BT656 interface output display.
3. apparatus for measuring cable digital television signals according to claim 1, it is characterized in that: described memory module comprises a synchronous DRAM and the FLASH module being connected with this synchronous DRAM, the frequency of described synchronous DRAM is 256MB, and the frequency of described FLASH module is 32Mb.
4. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: described memory module comprises a synchronous DRAM, and its frequency is 256MB.
5. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: the range of receiving of described tuner is 44MHZ-864MHZ, and signal strength signal intensity identification range is-65dBm-25dBm.
6. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: described power module comprises an external mains switch, carries macro-energy storage battery, also comprises a short-circuit protection circuit.
7. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: described apparatus for measuring cable digital television signals also comprises USB interface.
8. apparatus for measuring cable digital television signals according to claim 1, is characterized in that: the external 12.6V power supply of described power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402928.9A CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110402928.9A CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102404604A CN102404604A (en) | 2012-04-04 |
| CN102404604B true CN102404604B (en) | 2014-03-26 |
Family
ID=45886311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110402928.9A Active CN102404604B (en) | 2011-12-07 | 2011-12-07 | Apparatus for measuring cable digital television signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102404604B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841414B (en) * | 2014-03-18 | 2016-04-13 | 珠海迈科智能科技股份有限公司 | A kind of portable multi-function digital broadcasting-television signal measuring instrument |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201353730Y (en) * | 2008-12-16 | 2009-12-02 | 江苏锋泰钻石工具制造有限公司 | Porous skewed tooth abrasive wheel |
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
| CN102238412A (en) * | 2010-04-29 | 2011-11-09 | 吉林省龙阁视听有限责任公司 | Cable digital television monitor based on USB (universal serial bus) interface |
-
2011
- 2011-12-07 CN CN201110402928.9A patent/CN102404604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201353730Y (en) * | 2008-12-16 | 2009-12-02 | 江苏锋泰钻石工具制造有限公司 | Porous skewed tooth abrasive wheel |
| CN102238412A (en) * | 2010-04-29 | 2011-11-09 | 吉林省龙阁视听有限责任公司 | Cable digital television monitor based on USB (universal serial bus) interface |
| CN101951473A (en) * | 2010-09-08 | 2011-01-19 | 深圳金亚太科技有限公司 | Computer receiving device for digital television |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102404604A (en) | 2012-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104575550B (en) | Multimedia file title skipping method and electronic device | |
| US20160269803A1 (en) | Smart tv media player and playback progress adjustment method thereof, and smart tv | |
| KR101356503B1 (en) | Method for displaying internet television infomation of broadcasting receiver and broadcasting receiver enabling of the method | |
| CN105451068A (en) | Electronic program list generation method and device | |
| CN102413357A (en) | Testing apparatus and testing method thereof | |
| US10964316B2 (en) | Performing action on active media content | |
| JP2013247544A (en) | Portable terminal device | |
| CN106507172B (en) | Information coding method, coding/decoding method and device | |
| CN102447856A (en) | Channel switching reminding system, signal source switching reminding system and relevant method | |
| CN105472433A (en) | Method and device for providing program content and intelligent television | |
| CN102404604B (en) | Apparatus for measuring cable digital television signals | |
| CN202353730U (en) | Cable digital television signal measuring instrument | |
| CN201947279U (en) | Road tester for field intensity coverage of vehicle-mounted movable multimedia broadcasting | |
| CN102291621A (en) | Information processing apparatus, sameness determination system, sameness determination method, and computer program | |
| CN104837020A (en) | Video playing method and device | |
| KR101214515B1 (en) | System for providing additional information of broadcasting contents and method thereof | |
| US20110314510A1 (en) | Set-top box and entertainment system using the same | |
| CN111163310B (en) | Television audio test method, device, equipment and computer readable storage medium | |
| CN203012241U (en) | Video glasses provided with function of watching mobile digital TV | |
| CN102932620A (en) | Television and method of mobile high definition link (MHL) signal automatic recognition | |
| CN102594465A (en) | Vehicle-mounted mobile multimedia broadcasting field intensity covering road tester | |
| CN204697215U (en) | Video capture device | |
| US20090220214A1 (en) | Method and Apparatus for Reproducing Image | |
| CN110557668B (en) | Sound and subtitle accurate alignment system based on wavelet ant colony | |
| CN201044476Y (en) | Home theater circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHUHAI MAIKE INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHUHAI GOTECH ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 519000 Guangdong city in Zhuhai Province town of Red Bay Area Yongda Road No. 66 No. 2 building Patentee after: ZHUHAI MAIKE INTELLIGENT TECHNOLOGY CO., LTD. Address before: 519090 Guangdong city in Zhuhai Province town of Red Bay Area Yongda Road No. 66 Patentee before: Zhuhai Gotech Electronic Technology Co., Ltd. |