CN2805259Y

CN2805259Y - Digital TV integrated set having ADSL interface

Info

Publication number: CN2805259Y
Application number: CNU2005200967800U
Authority: CN
Inventors: 邹雪城; 刘政林; 郑朝霞; 陈毅成
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2005-06-16
Filing date: 2005-06-16
Publication date: 2006-08-09
Anticipated expiration: 2015-06-16

Abstract

The utility model discloses a digital TV integrated set having an ADSL interface. The utility model is characterized in that the ADSL interface is connected to a CPU through a telephone circuit module and a modulation demodulation module separately; an input signal is divided into a telephone signal and a network signal by a separator in the ADSL interface, and the telephone signal and the network signal are separately transferred to the telephone circuit module and the modulation demodulation module; the telephone circuit module is used for dealing with the users' signalling of the telephone and coding or decoding the speech sound of the telephone signal at the standard algorithm, and the modulation demodulation module is used for the orthogonal amplitude demodulation and the error correction to the network signal; the processed telephone and network signals enter a channel selective circuit to be selected, and the selected signals are transferred to the CPU to be processed. The ADSL interface is added to the utility model to integrate a telephone net, an internet and a TV net. According to the choices of the users, the utility model has various multimedia service functions including the internet browse, the reception of wire digital television programs, the reception of network TV programs and the dialling of common phone calls or IP calls.

Description

A kind of digital TV integrated machine with adsl interface

Technical field

The utility model belongs to broadband network to be used and technical field of television sets, is specifically related to the digital TV integrated machine of a kind of ADSL of having (Asymmetrical Digital Subscriber Line, ADSL (Asymmetric Digital Subscriber Line)) interface.

Background technology

ADSL is a kind of technology that broadband data service can be provided by ordinary telephone line, is a kind of access technology that has development prospect at present.ADSL have the good reputation of " ADSL ", does not influence characteristics such as telephony feature in the time of, online excellent, easy for installation because of its downstream rate height, bandwidth, performance and is subjected to liking of users deeply, has become domestic a kind of network connection mode of popularizing very much.

The development cable digital TV is the concentrated reflection of radio and television digitlization, networking, and it meets the needs of national industrial policies development.At present, strictly speaking the Digital Television of selling on the market, is not Digital Television, but digital television signal display HDTV READY.Because can not resembling, such Digital Television plugs holding wire our the common TV, just can directly watch digital television program, also need to connect again a set-top box, receive and the switching signal form, could demonstrate digital television program on TV, if there is not this set-top box, Digital Television resolution is high more also of no use.But digital TV integrated machine is just different, because it has done into television set inside to the hardware facility of set-top box, so need not buy set-top box in addition again.So, we only need connect television signal line and just can watch digital television program.So digital TV integrated machine is considered to " Digital Television truly ", represented following Digital Television developing direction.In the near future, digital TV integrated machine will progressively become one of main receiving terminal of cable TV by means of the performance advantage of self.

For more better service are provided to the user, can utilize the infrastructure of cable television network, as main terminal appliance, connecting broadband networks by adsl interface provides the multiple digital media service that comprises TV programme with domestic television set.The service that present Digital Television can provide is abundant inadequately, does not make full use of the resource of broadband networks, has limited the popularization of Digital Television to the user.

The utility model content

The purpose of this utility model provides a kind of digital TV integrated machine with adsl interface, and this digital TV integrated machine combines together different business on identical platform, has realized the information processing to subscriber phone signaling and IP network.

A kind of digital TV integrated machine that the utility model provides with adsl interface, it comprises channel selection circuit, display screen and CPU, it is characterized in that: it also comprises adsl interface, telephone circuit module and modulation module; Wherein, adsl interface links to each other with CPU with the modulation module by the telephone circuit module respectively; Separator in the adsl interface is separated into telephone signal and network signal to input signal, telephone signal after the separation enters the telephone circuit module, the telephone circuit module is handled the subscriber signaling of phone, and the voice of telephone signal is carried out the coding or the decoding of canonical algorithm; Network signal after the separation enters the modulation module, and the modulation module is carried out quadrature amplitude demodulation and error recovery to network signal; Telephone signal after the processing and network signal admission passage are selected circuit, and channel selection circuit is selected signal, and selected signal is sent to CPU handles.

The utility model has increased adsl interface to digital TV integrated machine, make digital TV integrated machine both can connect telephone network, can connect the Internet again, can realize multimedia service and the Network and the telephone service of Digital Television, telephone network, the Internet and television network are connected in one.It disposes multiple multimedia service function according to user's selection, comprises view Internet, receives the cable digital TV program, receives network TV program and dial plain old telephone or IP phone.The utility model has reduced the hardware development cost again when utilizing abundant Internet resources.It is applicable to family and public place.

Description of drawings

Fig. 1 is existing digital TV integrated machine functional-block diagram.

Fig. 2 is the functional-block diagram of a kind of embodiment of the present utility model.

Fig. 3 is the utility model main interface connecting circuit schematic diagram.

Fig. 4 is the connection diagram of the utility model adsl interface and outside network device.

Embodiment

As shown in Figure 1, present digital TV integrated machine 100 mainly comprises circuit such as CPU110, memory 108, digital processing chip 109, analog signal interface 101, A/D change-over circuit 102, digital signal interface 103, channel selection circuit 106, supply power voltage and signal protection circuit 107, signal amplification and display circuit 113, display control circuit 114, sound treatment circuit 112, panel display screen 117.As required, can also set up EEPROM (the read-only memory access of multichannel electric erasable) 111, USB interface terminal 104 and 1394 standard interfaces 105.

CPU110 is controlling the work of whole digital TV integrated machine.Parameter when EEPROM111 stores some components and parts steady operations is used when initialization data and the refresh data for CPU110.Memory 108 mainly is divided into Flash internal memory and sdram memory: Flash and is used for storage system software, drive software, application program and some user profile, content also can keep when system cut-off, Flash can upgrade software contained on it by online mode simultaneously, reaches the purpose of software upgrading; SDRAM is used for storing applied data.Digital processing chip 109 is the dual decoding chip, supports MPEG2 and MPEG4 decoding, comprises video, audio decompression and other function.Analog signal interface 101 can receive anolog TV signals, converts digital television signal to by the A/D change-over circuit and delivers to digital processing chip.Digital signal interface 103 is receiving digital television signal directly.Channel selection circuit 106 can which kind of external signal of selective reception.Finally on panel display screen 117, show through amplifying circuit and control circuit through digital processing circuit 109 decoded images and voice signal.

Increase the digital TV integrated machine 400 of adsl interface, as shown in Figure 2.It comprises that CPU110, memory 108, digital processing chip 109, analog signal interface 101, A/D change-over circuit 102, digital signal interface 103, channel selection circuit 106, supply power voltage and signal protection circuit 107, EEPROM111, signal amplify and circuit such as display circuit 113, display control circuit 114, sound treatment circuit 112, panel display screen 117, adsl interface 418, telephone circuit module 419 and modulation module 420.Equally, also set up USB interface terminal 104 and 1394 standard interfaces 105 as required.

The utility model is exactly to increase adsl interface 418, telephone circuit module 419 and modulation module 420 on the main frame of existing digital television.As shown in Figure 3, adsl interface 418 adopts twisted-pair feeder to link to each other with modulation module 420 with telephone circuit module 419, to realize being connected of adsl interface 418 and IP network and telephone network.Signal transmits by twisted-pair feeder, can reduce the interference of outer bound pair signal.Separator in the adsl interface 418 is separated into telephone signal and network signal to input signal earlier, and the telephone signal after the separation enters telephone circuit module 419, and network signal enters modulation module 420 and carries out quadrature amplitude demodulation.Modulation module 420 is carried out quadrature amplitude demodulation to network signal earlier, carries out error recovery then.Modulation module 420 is connected with CPU110 by pci bus with telephone circuit module 419, telephone signal and network signal admission passage after telephone circuit module 419 and modulation module 420 are handled are selected circuit 106, select by channel selection circuit 106 which kind of signal is sent into CPU110 by the main frame pci bus.The CPU110 operation is stored in the software program of 108 li of memories, finishes network connection protocol, data-signal processing, Streaming Media decoding, phone control signaling process, the demonstration of display screen.

Telephone circuit module (419) comprises DTMF pulsing circuit (DTMF), subscribers feeder interface circuit (SLIC), voice signal sample circuit and encoding and decoding speech circuit.Wherein, SLIC handles the subscriber signaling of phone, and the encoding and decoding speech circuit carries out canonical algorithm coding or decoding G.723, G.726 or G.729 to the voice of telephone signal.

Fig. 4 is the connection diagram of the utility model adsl interface 418 and outside network device interface.General external network interface is a RJ-11.RJ-11 has six pins, only uses pin 3 and pin 4 in application of the present utility model, remaining four pins are unsettled need not.

Claims

1, a kind of digital TV integrated machine with adsl interface, it comprises channel selection circuit, display screen and CPU, it is characterized in that: it also comprises adsl interface (418), telephone circuit module (419) and modulation module (420);

Adsl interface (418) links to each other with CPU (110) with modulation module (420) by telephone circuit module (419) respectively; Separator in the adsl interface (418) is separated into telephone signal and network signal to input signal, telephone signal after the separation enters telephone circuit module (419), telephone circuit module (419) is handled the subscriber signaling of phone, and the voice of telephone signal is carried out the coding or the decoding of canonical algorithm; Network signal after the separation enters modulation module (420), and modulation module (420) is carried out quadrature amplitude demodulation and error recovery to network signal; Telephone signal after the processing and network signal admission passage are selected circuit (106), and channel selection circuit (106) is selected signal, and selected signal is sent to CPU (110) handles.

2, Digital Television according to claim 1 is integrated, it is characterized in that: supply power voltage and signal protection circuit (107) are connected with USB interface terminal (104).