CN101345832B

CN101345832B - Data card and data transmission method

Info

Publication number: CN101345832B
Application number: CN2008101464101A
Authority: CN
Inventors: 樊艳梅
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd; Huawei Device Shenzhen Co Ltd
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2011-02-09
Anticipated expiration: 2028-08-28
Also published as: CN101345832A

Abstract

The embodiment of the present invention discloses a data card and data transmission method. The data card includes a floor digital video broadcast DVB-T receiving module, and a Universal Mobile Communication System UMTS module. Through the connection of the UMTS module and DVB-T receiving module, the UMTS module can indicate the PID filtering condition of the DVB-T receiving module according to the instruction of the user terminal, to realize the dynamic filtering to the output PID; and effective filtering can be performed to the DVB-T output signals and user side receiving signals through a UMTS module.

Description

Data card and data transmission method

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a data card and a data transmission method.

Background

The television receiving equipment is combined with other equipment, such as computers, mobile phones and the like, so that a plurality of new products are generated, and the requirement of people for watching television anytime and anywhere is met. Therefore, the research on how to combine the digital television broadcasting technology with other digital technologies becomes a significant research direction.

In DVB (Digital Video Broadcasting), the first research and standardization in Europe established Digital television Broadcasting standards supported by ITU (International Telecommunication Union) including DVB-S, DVB-C and DVB-T, which are respectively suitable for satellite television, cable television and terrestrial television Broadcasting, have been approved by ETS (European communications Standard) and are adopted by many countries and regions other than Europe for commercial Broadcasting according to the DVB Standard.

Currently, the three major terrestrial digital television standards in the world are: the ATSC (advanced television systems Committee ) in the united states adopts a single carrier technology; the Japanese ISDB-T standard OFDM (Orthogonal Frequency Division Multiplexing) technology and the European DVB-T standard COFDM (Coded Orthogonal Frequency Division Multiplexing, multi-carrier technology).

The digital tv has the advantages of high image definition, high fidelity of accompanying sound, and a large number of programs, and can also perform data transmission service, and realize digital interactive function, i.e. digital On Demand (VOD).

Technical solution in the prior art, as shown in fig. 1, a DVB-T receiving card includes: the DVB-T receiving and processing chip receives the digital television signals and transmits data containing the digital television signals to a PC (Personal Computer) through an external interface.

The transmission rate of DVB-T is distributed in the range of 5Mbps-32Mbps according to different modulation modes; the bandwidth of one television program is 2-6Mbps, so that one DVB-T frequency point can multiplex a plurality of channels, but users generally watch one channel at the same time. Therefore, a PID (Program IDentification) filtering function is usually added to the DVB-T receiving chip, and the output TS includes all PSI (Program specific Information), SI (Service Information) and audio/video stream of a channel, so that the output bandwidth of the DVB-T receiving chip can be reduced. However, such filtration must be performed in advance of the preset filtration conditions.

In the process of realizing the method, the inventor finds that at least the following problems exist in the prior art: the DVB-T receiving chip can filter the output TS only by presetting a filtering condition; the DVB-T receiving chip directly outputs the TS to the PC, and the TS is not further processed.

Disclosure of Invention

The embodiment of the invention provides a data card and a data transmission method, which are used for effectively filtering DVB-T output signals and user side receiving signals through a UMTS module.

An embodiment of the present invention provides a data card, including:

a DVB-T receiving module for ground digital video broadcasting, a UMTS module for universal mobile telecommunication system;

the DVB-T receiving module is used for receiving a ground digital video broadcasting signal, filtering the signal according to a program identification filtering condition sent by the UMTS module and sending the filtered signal to the UMTS module;

the UMTS module is used for acquiring and sending the program identification filtering condition to the DVB-T receiving module according to an instruction of a user terminal, receiving and processing the signal filtered by the DVB-T receiving module and sending the processed signal to the user terminal;

the UMTS module comprises:

the condition acquisition unit is used for acquiring the program identification filtering condition;

the signal receiving unit is used for receiving the signal filtered by the DVB-T receiving module according to the program identification filtering condition and processing the signal;

the condition acquisition unit includes:

the instruction processing subunit is used for processing the instruction and generating a program identifier filtering condition, or a local program association table PAT, or a program mapping table PMT;

the signal receiving unit includes:

and the processing subunit is used for processing the signals sent by the DVB-T receiving module according to the program identification filtering condition to acquire a program list or replace the PAT and the PMT in the received signals by the local PAT and the PMT generated by the instruction processing subunit. .

An embodiment of the present invention provides a data transmission method, including:

acquiring program identification filtering conditions;

filtering the signal according to the program identification filtering condition;

processing the filtered signal;

sending the processed signal to a user terminal;

the acquiring of the program identifier filtering condition comprises: processing the instruction sent by the user terminal to generate a program identifier filtering condition, or a local program association table PAT, or a program mapping table PMT;

the processing the filtered signal comprises:

drawings

Acquiring program list or replacing PAT and PMT in the signal with the local PAT and PMT.

Compared with the prior art, the embodiment of the invention at least has the following advantages:

by adopting the series connection of the UMTS module and the DVB-T receiving module, the UMTS module can indicate the PID filtering condition of the DVB-T receiving module according to the instruction of the user terminal, thereby realizing the dynamic filtering of the output PID; and effectively filtering the DVB-T output signals and the signals received by the user terminal through the UMTS module.

Fig. 1 is a schematic structural diagram of a technical scheme of a DVB-T receiving card in the prior art;

FIG. 2 is a schematic structural diagram of a data card according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a DVB-T receiving module in an embodiment of the present invention;

FIG. 4 is a block diagram of a UMTS module according to an embodiment of the present invention;

FIG. 5 is a flowchart illustrating a data transmission method according to an embodiment of the present invention;

Detailed Description

FIG. 6 is a detailed flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 7 is a detailed flowchart of a data transmission method according to another embodiment of the present invention;

fig. 8 is a detailed flowchart of a data transmission method according to another embodiment of the invention.

The embodiments of the present invention will be described in detail below with reference to the drawings and examples.

An embodiment of the present invention provides a data card, as shown in fig. 2, including:

a DVB-T receiving module 210, a UMTS (universal Mobile Telecommunications system) module 220;

the DVB-T receiving module 210 is connected in series with the UMTS module 220; wherein,

the DVB-T receiving module 210 is configured to receive a terrestrial digital video broadcasting signal, filter the received signal according to a program identifier filtering condition sent by the UMTS module 220, and send the filtered signal to the UMTS module 220;

the UMTS module 220 is configured to obtain and send a program identifier filtering condition to the DVB-T receiving module 210 according to an instruction of the user terminal, receive and process a signal sent by the DVB-T receiving module 210 according to the program identifier filtering condition, and output the processed signal to the user terminal.

In another embodiment of the present invention, the structure of the UMTS module 220 is shown in fig. 3, and may include:

a condition obtaining unit 310, configured to obtain a program identifier filtering condition;

a first sending unit 320, configured to send the program identifier filtering condition obtained by the condition obtaining unit 310 to a DVB-T receiving module;

a signal receiving unit 330, configured to receive and process a signal filtered by the DVB-T receiving module according to the program identifier filtering condition;

a second sending unit 340, configured to send the signal received and processed by the signal receiving unit 330 to the user terminal.

In another embodiment of the present invention, the detailed structure of the UMTS module 220 is shown in fig. 4, and includes:

a condition obtaining unit 410, configured to obtain a program identifier filtering condition;

a first sending unit 420, configured to send the program identifier filtering condition obtained by the condition obtaining unit 310 to a DVB-T receiving module;

a signal receiving unit 430, configured to receive and process a signal sent by the DVB-T receiving module according to the filtering condition sent by the first sending unit 420;

a second transmitting unit 440, configured to transmit the signal received and processed by the signal receiving unit 330 to the user terminal.

The condition obtaining unit 410 may further include:

an instruction receiving subunit 411, configured to receive an instruction sent by a user terminal;

an instruction processing subunit 412, configured to process the received instruction, and generate a Program identifier filter condition, PAT (Program Association Table), or PMT (Program map Table).

The signal receiving unit 430 may further include:

a receiving subunit 431, configured to receive a signal sent by the DVB-T receiving module;

and a processing sub-unit 432, configured to process the signal received by the receiving sub-unit 431, and acquire a program list or replace PAT and PMT data in the received signal with local PAT and PMT data.

The second transmitting unit 440 may further include:

a list transmission subunit 441 configured to transmit the program list to the user terminal;

the program list is transmitted in an XML (eXtensible Markup Language) format.

A replacing and transmitting subunit 442, configured to transmit the signal after the replacing and processing by the processing subunit 432 in the signal receiving unit 430 to the user terminal.

By adopting the device provided by the embodiment of the invention, the UMTS module can instantly control the DVB-T receiving module to adjust the PID filtering condition according to the change of the channel program of the user terminal, thereby realizing the dynamic filtering of the output PID, transmitting the program list information in an XML form, reducing the program bandwidth and facilitating the user terminal to receive the program information.

An embodiment of the present invention provides a data transmission method, as shown in fig. 5, including the following steps:

step s510, obtaining program identification filtering conditions;

step s520, filtering the signal according to the obtained program identification filtering condition;

step s530, processing the filtered signal;

step s540, the processed signal is sent to the user terminal.

By adopting the method provided by the embodiment of the invention, the UMTS module can instantly control the DVB-T receiving module to adjust the PID filtering condition according to the change of the channel program of the user terminal, thereby realizing the dynamic filtering of the output PID, transmitting the program list information in an XML form, reducing the program bandwidth and facilitating the user terminal to receive the program information.

The above steps are further described in detail by specific application scenarios. The user terminal takes a PC as an example, and is described by turning on the PC, selecting a channel, and switching a channel.

The embodiment of the invention provides a data transmission method, and when a user starts up, as shown in fig. 6, the method comprises the following steps:

step s601, the PC is started up and sends a starting-up instruction to the UMTS module;

step s602, the UMTS module receives the instruction, constructs the PID with the initial PID filtering condition of PAT, that is, PID is 0, and sends the filtering condition to the DVB-T receiving module;

step s603, the DVB-T receiving module receives the TS, and sends the data with PID ═ 0 to the UMTS module according to the received filtering condition;

step s604, the UMTS module analyzes the data with PID ═ 0 transmitted by the DVB-T receiving module, constructs PAT, and caches the received data;

step s605, the UMTS module adds PID of SDT (Stream Description Table), i.e. PID of 2 and PID of all PMT in the PAT to the filtering condition, and sends it to the DVB-T receiving module;

step s606, the UMTS module receives the TS sent by the DVB-T receiving module according to the new filtering condition, and analyzes and constructs all the PMT and SDT;

step s607, the UMTS module analyzes PMT, SDT to get the channel list, and converts it into XML format, and sends it to PC for the user to choose;

step s608, the UMTS module restores the filtering condition to the initial value PID being 0;

information of PID 0 in the multi-channel data stream updated at any time, that is, information corresponding to the PID of the PAT is received.

The following description will be given by taking the case where the user selects a channel as an example, as shown in fig. 7, including the following steps:

step s710, the PC sends a channel selection instruction to the UMTS module according to the channel selected by the user;

step s720, the UMTS module analyzes the PMT of the channel selected by the user from the buffer data, adds the program stream PIDs related to the channel in the PMT, such as PIDs of the video stream and the audio stream, to the filtering condition, and sends the filtering condition to the DVB-T receiving module;

step s730, the UMTS module constructs PAT and PMT only containing the channel information;

step s740, the UMTS module receives TS, simplifies PAT and PMT;

the UMTS module replaces PAT in the received TS with locally constructed PAT and replaces PMT in the TS with locally constructed PMT; PAT, PMT in TS contain information of multi-channel, and local PAT, PMT only contain PAT, PMT information related to channel selected by user terminal;

step s750, the UMTS module sends the modified TS to the PC;

the modified TS includes the program stream of the channel and the PAT and PMT which include only the channel information after simplification.

The following description will be given by taking the case of switching channels by a user as an example, as shown in fig. 8, including the following steps:

step s810, the PC sends a channel switching instruction to the UMTS module;

the UMTS module checks whether the PID related to the current channel exists in the filtering condition, if so, the PID related to the current channel and the stored PAT and PMT of the current channel are deleted from the filtering condition;

step s820, the UMTS module searches and analyzes the PMT of the new channel from the cached data, adds the PID of the program streams of video, audio and the like related to the new channel in the PMT of the new channel to the filtering condition, and sends the PID to the DVB-T receiving module;

step s830, the UMTS module constructs PAT and PMT only containing new channel information;

step 840, the UMTS module receives TS, simplifies PAT and PMT;

the UMTS module replaces PAT in TS with local newly constructed PAT, and replaces PMT in TS with local newly constructed PMT; the PAT, PMT in the TS sequence contains information of multiple channels, while the local PAT, PMT contains only PAT, PMT information associated with the new channel.

The UMTS module sends the modified TS to the PC, step s 850.

The modified TS includes a program stream of the new channel and PAT, PMT containing only new channel information.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A data card, comprising: a DVB-T receiving module for ground digital video broadcasting, a UMTS module for universal mobile telecommunication system;

the UMTS module comprises:

the condition acquisition unit includes:

the signal receiving unit includes:

and the processing subunit is used for processing the signals sent by the DVB-T receiving module according to the program identification filtering condition to acquire a program list or replace the PAT and the PMT in the received signals by the local PAT and the PMT generated by the instruction processing subunit.

2. The data card of claim 1, wherein the UMTS module further comprises:

a first sending unit, configured to send the program identifier filtering condition obtained by the condition obtaining unit to the DVB-T receiving module;

and the second sending unit is used for sending the signal processed by the signal receiving unit to the user terminal.

3. The data card of claim 1, wherein the condition acquisition unit further comprises:

and the instruction receiving subunit is used for receiving the instruction sent by the user terminal.

4. The data card of claim 1, wherein the signal receiving unit further comprises:

a receiving subunit, configured to receive a signal sent by the DVB-T receiving module according to the program identifier filtering condition;

5. the data card of claim 2, wherein the second transmission unit comprises:

a list transmitting subunit, configured to transmit a program list to the user terminal;

and the replacement transmitting subunit is used for transmitting the signals after PAT and PMT replacement processing of the signal receiving unit to the user terminal.

6. The data card of claim 5, wherein the list transmission subunit transmits the program list in an extensible markup language format.

7. A method of data transmission, comprising:

acquiring program identification filtering conditions;

processing the filtered signal;

sending the processed signal to a user terminal;

the processing the filtered signal comprises:

8. The method of claim 7, wherein said obtaining program identification filter terms further comprises:

and receiving an instruction sent by the user terminal.

9. The method of claim 7, wherein said transmitting the processed signal to a user terminal comprises:

sending a program list to the user terminal; or

And sending the signals after the PAT and PMT replacement processing to the user terminal.