CN201450546U - Digital television receiver - Google Patents
Digital television receiver Download PDFInfo
- Publication number
- CN201450546U CN201450546U CN 200920042972 CN200920042972U CN201450546U CN 201450546 U CN201450546 U CN 201450546U CN 200920042972 CN200920042972 CN 200920042972 CN 200920042972 U CN200920042972 U CN 200920042972U CN 201450546 U CN201450546 U CN 201450546U
- Authority
- CN
- China
- Prior art keywords
- digital television
- chip
- stream
- receiving apparatus
- signal
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
The utility model provides a single-chip digital television receiver with the function of time shifting, which realizes the temporary storage and time shifting playback of received digital television signals by utilizing an external mobile storage device. The digital television receiver comprises an independent main chip which is used for receiving TS stream output by a digital demodulator, temporally storing the processed TS stream to the external mobile storage device through a USB interface and reading the temporally-stored TS stream to play back the TS stream during time shifting playing. The digital television receiver is integrated on a PCB board, is suitable for receiving digital television signals of a DVB-T system, and can be widely applied to devices such as digital televisions, set-top boxes and the like.
Description
Technical field
The utility model relates to a kind of digital television receiving apparatus, more specifically, relates to a kind of single-chip digital television receiving apparatus with time shift (TIMESHIFT) function.
Background technology
At present, the broadcasting of the digital television program of various countries is fast-developing, and Digital Television market reaches its maturity.The digital television broadcasting DVB standard of being worked out by Europe has particularly in the field of businessly obtained general application.The DVB standard comprises a series of technical schemes such as DVB-C/DVB-S/DVB-T, be applicable to various dissimilar digital television broadcastings, wherein satellite digital TV adopts the DVB-S standard to transmit, and cable digital TV adopts the DVB-C standard, and terrestrial DTV then adopts the transmission of DVB-T standard.
For receiving digital television broadcast, at the receiving terminal of broadcasting (for example, digital TV set-top box or have the television set of digital broadcasting receiving function), utilize tuner to receive the Digital Television carrier signal of DVB-C/DVB-T/DVB-S standard, and utilize demodulator that above-mentioned signal demodulation is generated the TS code stream.This TS code stream is transfused to the master chip of the receiving terminal with decoding function, decode and signal processing, thereby the generation video/audio signal shows or exports.
For digital television broadcasting, the user goes back the requirement of ubiquity time-shifting function.So-called time-shifting function refers to when playing digital television program, program data is kept on the backstage, thereby not only can see the program of real-time reception when the user watches, and also can carry out playback to the program of certain period of recording before and watch.Television set with time-shifting function can provide temporaty suspension, before programme content is carried out playback, watches functions such as program segment repeatedly for program audience, has improved user's the degree of freedom of watching.In order to realize time-shifting function, hope can be temporary to external movable storage device, for example USB flash disk, PDA, portable hard drive etc. with digital television signal.Then, when the operation time-shifting function, from external equipment, read temporary digital television signal again and carry out playback.
Yet a lot of in the prior art digital television receiving apparatus can not provide time-shifting function.Part can provide the existing receiving system to the time-shifting function of digital television broadcasting, though can digital TV broadcast signal is temporary to external movable storage device by interfaces such as USB.But this type of device generally all adopts multicore sheet design, and an interface chip module need be set separately beyond the master chip of receiving system again, and is by this interface chip module that the digital television code stream of master chip output is temporary to external movable storage device.The design of this multimode causes the structure relative complex of digital television receiving apparatus, is unfavorable for the stable operation of time-shifting function, has also increased the cost of digital television receiving apparatus.
Therefore, need a kind of improved digital television receiving apparatus, it need not above-mentioned interface chip module, also can provide time-shifting function, promptly can digital television signal is temporary to external movable storage device, and the program of certain period of record is carried out playback according to user's needs.
The utility model content
A purpose of the present utility model provides a kind of single-chip digital television receiving apparatus with time-shifting function, the digital television signal that utilizes external movable storage device to achieve a butt joint to receive temporary need send out and can carry out playback to the program of certain temporary period according to the user.
Described single-chip digital television receiving apparatus comprises:
Tuner is used for the receiving digital television radiofrequency signal and exports intermediate-freuqncy signal;
Digital demodulator, the described intermediate-freuqncy signal that is used for the output of demodulation tuner generates TS stream;
Master chip, the TS that receives digital demodulator output flows, and handles described TS stream and by USB interface the TS stream after handling is kept in external movable storage device; Under the normal play state, the TS stream after the described processing of decoding obtains and output is looked in real time, audio signal; Under time-shift playing state, read temporary TS stream by USB interface from external movable storage device, the temporary TS stream of decoding obtains and the output playback is looked, audio signal;
USB interface connects master chip and external movable storage device;
Video output interface, output decoded real time video signals of master chip or playback video signal;
Audio output interface, output decoded real-time audio signal of master chip or playing back audio signal.
Wherein, described Digital Television radiofrequency signal is the digital television signal of DVB-T or DVB-C or DVB-S standard.
Wherein, described digital demodulator communicates by I2C bus connection master chip.
Wherein, H.264 master chip to decoding from the TS stream of digital demodulator input or from the TS stream that external movable storage device reads;
Wherein, described video output interface is LVDS (low-voltage differential signal) interface.Perhaps, described video output interface and audio output interface are AV terminal.
Further, master chip generates and exports the OSD shows signal that is used to generate the electronic program guides interface.Under time-shift playing state, described OSD shows signal generates a playing progress bar.
Further, described single-chip digital television receiving apparatus also comprises the Flash flash memory, connects master chip, and a record part is used for the temporary TS flow data of digital television signal.Described Flash flash memory is the start-up routine of recording digital TV receiving system also, and master chip loads start-up routine from the guiding of Flash flash memory when device starts.
Wherein, the above-mentioned module of digital television receiving apparatus and interface are integrated on the pcb board.
Digital television receiving apparatus of the present utility model adopts the single-chip structure, need not interface chip, promptly can support to utilize external movable storage device (as, portable hard drive, USB flash disk, PDA etc.) to the temporary and time shift playback function of digital television signal, simplified system configuration effectively, make things convenient for the user to watch playback program, therefore can be broadcasted devices such as being applied to digital television, set-top box, Digital Television logging machine.
Description of drawings
Fig. 1 is the schematic diagram of digital television receiving apparatus embodiment of the present utility model.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, and above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with embodiment and embodiment accompanying drawing.
Fig. 1 has represented the principle schematic of digital television receiving apparatus of the present utility model.For a change, this digital television receiving apparatus adopts the system design of single-chip, realized reception, demodulation, decoding and time shift (TIME SHIFT) function to the Digital Television radiofrequency signal of DVB-T standard, promptly can utilize external movable storage device that the DVB-T broadcast singal is kept in, and the program of certain temporary period is carried out playback.
The digital television receiving apparatus of Fig. 1 can be built in the digital television, thereby make television set have the function that digital television program is watched in time shift. can utilize the input/output interfaces such as USB of television set, the external movable storage device (as portable hard drive, USB flash disk, PDA etc.) that is used for temporary digital television program signal.
The digital television receiving apparatus of Fig. 1 also can constitute an autonomous device, for example, can constitute a digital TV set-top box, utilize the signal input television set after this set-top box reception DVB-T broadcast singal also will be changed to show, external movable storage device can be connected to this set-top box so that program is kept in, so that read when carrying out time-shifting function and carry out playback.Those skilled in the art can look concrete condition, and digital television receiving apparatus shown in Figure 1 is applied to various occasion.
As shown in Figure 1, described digital television receiving apparatus comprises:
Tuner 101 is used to receive the Digital Television radiofrequency signal of DVB-T standard and export intermediate-freuqncy signal;
Digital demodulator 102, the intermediate-freuqncy signal that is used for 101 outputs of demodulation tuner generates TS stream;
Usb 1 04 connects master chip 103 and external movable storage device.
Video output interface 105, output master chip 103 decoded real time video signals or playback video signal;
Audio output interface 106, output master chip 103 decoded real-time audio signal or playing back audio signals.
Like this, under the normal play state, tuner 101 receiving digital television signals are also by after digital demodulator 102 demodulation, the TS stream input master chip 103 that obtains is handled, master chip outputs to the movable storage device that usb 1 04 connects to the TS stream after handling on the one hand then, realizes the temporary function to program data; The TS stream of decoding on the other hand after this processing obtains video/audio signal, then by look, audio output interface output, the video/audio signal here is real-time, realizes watching normally the TV programme function.And after entering time shifting broadcasting, master chip 103 reads temporary TS stream from external movable storage device, and the back output of decoding shows that at this moment Shu Chu video/audio signal prestores before being, realizes the playback function to TV programme.
Digital demodulator 102 is communicated by letter with master chip by the I2C bus, realizes reading and controlling of 103 pairs of digital television signal demodulating informations of master chip; H.264,103 pairs of master chips are decoded from the TS streams of digital demodulator 102 inputs, and by the video/audio signal of interface after to display and loud speaker output decoder; Wherein, video output interface can adopt LVDS (low-voltage differential signal) interface, and perhaps video output interface and audio output interface are the AV terminal of using always.
Watch digital television program for convenience, master chip 103 also generates and exports the OSD shows signal, is used to form the user interface of Digital Television.The user can utilize user interface to switch normal play state or time-shift playing state.Under time-shift playing state, the OSD shows signal can show a playing progress bar on screen, indicates the time range of current playback program, and the user can control the playback of program by dragging this progress bar.
Preferably, master chip 103 is also connected to Flash flash memory 107.Flash flash memory 107 and master chip 103 walk abreast addressing of address and data communication, Flash flash memory 107 is preserved the start-up routine of digital television receiving apparatus, carries out the guiding loading of start-up routine when device starts.
Like this, digital television receiving apparatus of the present utility model adopts the single-chip structure, support is to time shift (TIME SHIFT) function of digital television signal. and this digital television receiving apparatus can use the MSD series digit picture decoding chip of M-STAR company production as master chip, and integrated ALPS company produce the TDQG4-606A tuner, the digital demodulator CE6353 of Intel Company and the D-class power amplifier of Ti company. digital television receiving apparatus of the present utility model is integrated into above chip module on the pcb board, adopt vertical terminal to support global TV Peripheral Interface, be applicable to from 26 cun to 52 cun the output of LCD or PDP display through the digital television broadcasting vision signal of decoding processing.
Need to prove, though adopted the digital TV broadcast signal that meets the DVB-T standard in the above embodiments.Digital television receiving apparatus of the present utility model is not limited in and receives the DVB-T broadcast singal.One skilled in the art may determine that the broadcast singal that is received can be the satellite digital TV signal that meets the digital catv signal of DVB-C standard or meet the DVB-S standard equally.Can use and DVB-C or DVB-S the digital television signal tuner and the demodulator that adapt generate corresponding TS code stream, carry out other processing again by master chip.The processing procedure that the digital television signal that meets the DVB standard is converted to the TS code stream is well known in the art, so do not repeat them here.
The above only is an embodiment of the present utility model.Protection range of the present utility model is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claim was defined.
Claims (9)
1. single-chip digital television receiving apparatus with time-shifting function is characterized in that comprising:
Tuner is used for the receiving digital television radiofrequency signal and exports intermediate-freuqncy signal;
Digital demodulator, the described intermediate-freuqncy signal that is used for the output of demodulation tuner generates TS stream;
Master chip, the TS that receives digital demodulator output flows, and handles described TS stream and by USB interface the TS stream after handling is kept in external movable storage device; Under the normal play state, the TS stream after the described processing of decoding obtains and output is looked in real time, audio signal; Under time-shift playing state, read temporary TS stream by USB interface from external movable storage device, the temporary TS stream of decoding obtains and the output playback is looked, audio signal;
USB interface connects master chip and external movable storage device;
Video output interface, output decoded real time video signals of master chip or playback video signal;
Audio output interface, output decoded real-time audio signal of master chip or playing back audio signal.
2. single-chip digital television receiving apparatus according to claim 1 is characterized in that:
Described Digital Television radiofrequency signal is the digital television signal of DVB-T standard.
3. single-chip digital television receiving apparatus according to claim 1 is characterized in that:
Described digital demodulator connects master chip by the I2C bus and communicates.
4. single-chip digital television receiving apparatus according to claim 1 is characterized in that: H.264 described master chip further to decoding from the TS stream of digital demodulator input or from the TS stream that external movable storage device reads.
5. single-chip digital television receiving apparatus according to claim 1 is characterized in that: described master chip further generates and exports the OSD shows signal that is used to generate the electronic program guides interface; Under time-shift playing state, described OSD shows signal generates a playing progress bar.
6. single-chip digital television receiving apparatus according to claim 1 is characterized in that, also comprises:
The Flash flash memory is used for the start-up routine of recording digital TV receiving system;
Described master chip loads start-up routine from the guiding of Flash flash memory when device starts.
7. single-chip digital television receiving apparatus according to claim 1 is characterized in that:
Described video output interface is the LVDS interface.
8. single-chip digital television receiving apparatus according to claim 1 is characterized in that:
Described video output interface and audio output interface are AV terminal.
9. according to each the described single-chip digital television receiving apparatus in the above claim, it is characterized in that: each module of described digital television receiving apparatus and sets of interfaces are formed on the pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920042972 CN201450546U (en) | 2009-06-30 | 2009-06-30 | Digital television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920042972 CN201450546U (en) | 2009-06-30 | 2009-06-30 | Digital television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450546U true CN201450546U (en) | 2010-05-05 |
Family
ID=42555268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920042972 Expired - Fee Related CN201450546U (en) | 2009-06-30 | 2009-06-30 | Digital television receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201450546U (en) |
-
2009
- 2009-06-30 CN CN 200920042972 patent/CN201450546U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101252637A (en) | Combined digital set top boxes based on software radio | |
| CN102088632A (en) | Condition receiving apparatus capable of supporting two program sources and implementation method thereof | |
| CN103686011A (en) | Television signal receiving module and method | |
| CN201450547U (en) | Digital television receiving device | |
| US8842224B2 (en) | Image signal processing apparatus for detaching a plurality of modules and control method thereof | |
| CN108965953A (en) | It is a kind of to receive DVB-C and DTMB simple two-way signal set-top-box system and method simultaneously | |
| CN203775349U (en) | Television signal receiving socket | |
| CN205092938U (en) | But speech recognition's STB and smart home systems thereof | |
| CN201854360U (en) | Digital television receiving device | |
| CN103402064B (en) | A kind of digital satellite television receives device | |
| CN201450546U (en) | Digital television receiver | |
| CN204887296U (en) | Cable television fuses STB with terrestrial digital TV and IPTV terminal | |
| CN202143181U (en) | Novel network television set top box | |
| US20070079344A1 (en) | Personal video recorder and method of transmitting broadcast signal to external multimedia apparatus from the same | |
| CN207638801U (en) | It is a kind of to receive DVB-C and DTMB simple two-way signal set-top boxes simultaneously | |
| CN101908901B (en) | Signal transmission interface and digital broadcasting receiver device | |
| CN107317981B (en) | Channel receiving switching control device and method based on DVB-C and DTMB | |
| CN101193218A (en) | TV set for receiving digital signals and analog signals | |
| CN203057372U (en) | Digital television receiving terminal | |
| CN201986091U (en) | Wireless digital television signal receiving device | |
| CN207382476U (en) | One kind supports cable TV signal and ISDB-T dual mode systems based on set-top box | |
| CN204795442U (en) | Digital television receiving equipment | |
| CN219420875U (en) | Set top box supporting ATV signal output | |
| CN201444669U (en) | Mobile television compatible with CMMB signals and DTMB signals | |
| KR20100005841A (en) | Digital television and digital television system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20120630 |