CN1946176A

CN1946176A - Device and method for real time high speed receiving and transmitting DVB data

Info

Publication number: CN1946176A
Application number: CNA2006101408189A
Authority: CN
Inventors: 祝万昌; 苏国庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-11
Filing date: 2006-10-11
Publication date: 2007-04-11

Abstract

This invention relates to a device for transmitting and receiving high speed DVB data timely including a TS receiver, a data receiving module, a data buffer-storage and a data transmission module. A method used by this device includes: a, putting input DVB signals into the TS receiver and turning them into TS after process, b, receiving, de-multiplexing and de-packaging the TS loading high speed data to recover it to a necessary IP data packet, c, storing it in a data buffer- storage, d, a data transmitter reads data to be transmitted to a physical data transmitter interface then to be transmitted to a terminal device using the data, and the data transmitted by the device can be read and transmitted from the buffer-storage timely to realize transmitting and receiving high speed data timely.

Description

The apparatus and method that the DVB data in real time receives at a high speed and transmits

Technical field

The invention belongs to the digital television techniques field, specially refer to that to be used for the DVB Radio Data System be the apparatus and method that the data in real time of carrier DVB receives at a high speed and transmits with the transport stream.

Background technology

Along with the development of DVB technology, very general by the application of transmitting mass data for the data broadcasting mode of carrier with TS (ISO/IEC 13818-1 standard is followed in transport stream, the abbreviation of Transport Stream).The data transmission that is applied as representative with multimedia video, digital audio, website, education etc. is very high for the requirement of the information rate of receiving terminal, in such application model, at present, receive the technology and the method for the data receiver of data broadcasting, also there are following defective and deficiency, as:

(1) in present data broadcasting is used, generally adopt the method for on the pci bus of PC (personal computer, Personal Computer) machine, inserting a DVB data receiver card to realize.This method is the high-speed data channel by pci bus, high-performance CPU (CPU) with PC, with real-time mode control DVB data receiver card, reception is that the data of carrier are in the PC internal memory with TS, do software data demultiplexing and decapsulation with CPU again, carry out data and use or be stored on the hard disk.This implementation method must depend on PC, and its Data Receiving performance depends on the performance of PC, so small product size is big and the price height, uses scene and scope to be restricted.

(2) being the data broadcast receiving apparatus that designs of core with various STB (set-top box, Set Top Box) chip, is one of present lower-cost solution.This method is because the use single CPU with software realization PS/MPE bag reception and decapsulation, drives IP (Internet protocol, Internet Protocol) with software mode again or USB (USB, Universal Serial Bus) does the data transmission.Implement by this way to receive and transmit to reach to use desired high-speed reception transmission.If also need to increase the real-time storage function, will make whole efficiency seriously low, can't reach especially to receive and require as the high-speed data of multimedia application.

(3) introduce high performance application, also there is a kind of method to be to use STB chip or FPGA (Field Programmable Gate Array field programmable gate array) as DVB Data Receiving core, do system control with high performance CPU again, thus control of realization system and high-speed datacasting Data Receiving, transmission.This method is normally used for the telecom carrier-class device of specialty, can use for the system that difference requires, but the cost height is not suitable for popularization and application.More than three aspects the existing deficiency of current state all is described, the needs of further research and development have also been proposed simultaneously.

Summary of the invention

The technical issues that need to address of the present invention are, at relying on the PC performance for storage, transmission in the prior art, small product size is big, price height or whole efficiency are low, be not suitable for popularizing and many weak points such as just use, in order to overcome these deficiencies, the apparatus and method that just need a kind of new DVB data in real time of exploitation to receive at a high speed and transmit, purpose of the present invention, being to provide a kind of is the apparatus and method that the DVB data in real time of carrier receives at a high speed and transmits with TS, in order to realize receiving at a high speed and transmitting the DVB data broadcasting.This method can adopt hardware method to implement.Received data can be TS, PS (program stream, the abbreviation of Private Section, follow ISO/IEC 13818-1 standard) or MPE (multi-protocols encapsulation, ETSI EN 301 192 standards are followed in the abbreviation of Multiprotocol encapsulation) in the IP packet.

In order to realize purpose of the present invention, realize by the following technical solutions, the device that a kind of DVB data in real time receives at a high speed and transmits, comprise a TS receiver, it is characterized in that, this device also comprises a data receiver module A, a data buffer B, data transmitting module C three parts, wherein, data reception module A, its inside comprises TS filter and MPE/IP filter again, and this module is that the data that needs receive are extracted from TS, through TS filter and MPE/IP filter, receive, unpack, filtration is reduced into needed IP packet, and is stored in data buffer B; Data buffer B is a binary channels FIFO (first in first out) data buffer, works in the mode of first in first out, can accept data reception module A simultaneously and write data and data transmitting module C sense data.Its function makes A data reception module and C data transmitting module can work simultaneously and do not disturb mutually, as long as guarantee the data reading speed greater than writing speed, just can realize that real time data transmits; Data transmitting module C, its inside comprises that again data transmitter and physical data transmit interface.This module is responsible for data are read in the Data Receiving buffer, by the physical data forwarder interface data are sent to terminal equipment, the physical data forwarder interface is the Ethernet data-interface, and the data of this device output are the UDP/IP bag, and it is to send terminal equipment to one way system.

Data transmitting module C optimizes with the one way system formation in this device, can directly use the hardware state controller to realize.And need not use cpu system, thereby can simplify global design, the data that transmit can directly read real-time transmission from data buffer in real time, and the transfer rate ability that only needs physical data transmission interface just can realize that greater than information rate real time data receives transmission.With Ethernet (100BaseT) data-interface is example, and its data transfer rate is greater than 80MBIT/S, and this is the information rate that is far longer than the DVB receiver.

Implementation method has also been simplified in the unidirectional design of optimizing, and the data reception module A that is comprised in this device, data buffer B, data transmitting module C are to adopt single FPGA or chip form to realize.Thereby greatly reduce cost.The core component of described TS receiver is Tuner (an electronics high-frequency digital tuner), is used for receiving the signal of DVB; This receiver can be transformed into TS with the DVB signal processing; Its Tuner can be the type of DVB-C, and the coaxial cable that can connect the FHC network receives the data of DVB-C; Its Tuner also can be the type of DVB-S, can connect the data that satellite earth antenna receives DVB-S; Its Tuner can also be the type of DVB-T (CDMB-T), can also connect the data that the surface wave reception antenna receives DVB-T (CDMB-T); Terminal equipment 200 can be set-top box, medium projector, computer or various expert data equipment.

Described DVB data in real time receives the implementation method with conveyer at a high speed, it is characterized in that: operate according to following steps: a, with the input the DVB signal enter the TS receiver, the treated TS that becomes; The TS that b. will carry the high speed mass data receives, demultiplexing, filtration, decapsulation, is reduced into required IP packet; C. be stored in the data buffer; D. deliver to the physical data forwarder interface by the data transmitter reading of data, be transferred to the terminal equipment of follow-up use data again.

Described physical data forwarder interface is the Ethernet interface; Transmitting data can be the IP packet of TS, PS or MPE.TS receiver that is connected with device and terminal equipment provide to be set to data input and output relation among the present invention,

The invention has the beneficial effects as follows: this installs employed method, the data of output can be wrapped as UDP/IP, be to send terminal equipment to one way system, delivery module optimization is designed with one way system, can directly use the hardware state controller to realize, and need not use cpu system, thereby simplify global design.The data that transmit can directly read real-time transmission from buffer in real time, to realize real time high-speed Data Receiving, storage and transmission.Implementation method has also been simplified in the unidirectional design of optimizing, and can use VHDL or other hardware description language to realize with single FPGA or ic core sheet mode, thereby reduce cost.

Description of drawings

Fig. 1 is this apparatus structure composition frame chart;

Fig. 2 receives at a high speed and the transfer approach flow chart for DVB data in real time in this device.

Embodiment

The present invention will be further described below in conjunction with preferential embodiment.With reference to Fig. 1, represent this device composition frame chart, among the figure, TS receiver as the importation is 100, data are packed in the mode of IPover DVB, transmit the DVB signal through the broadcasting of DVB network system, and the DVB network system can be that DVB-C, DVB-S or DVB-T are any.Via TS receiver 100, the DVB signal that reception sends from Radio Data System is connected to TS filter 101 and the MPE/IP filter 102 the data reception module A; This data reception module A links to each other with data buffer B and two-way transmission; Be connected to data transmitter 104 and physical data forwarder interface 105 among the data transmitting module C by this buffer 103,, transmit interface 105 by physical data and send terminal equipment 200 to through the reception and the processing of native system to data.It is Ethernet interfaces that physical data transmits interface 105.

Data reception module A and data transmitting module C are two modules that work alone, and data buffer B couples together two modules as the data bridge.

Represent with reference to Fig. 2, data in real time high speed, reception storage and transfer approach flow chart, execution in step is as follows: TS receiver 100 is the DVB data shift signal TS data of numeral, through TS filter 101, and the pid parameter during relatively TS wraps, if pid parameter is consistent with the TS bag of required selective reception, just carry out next step, if inconsistent, just abandon this packet, and repeat step.

The packet that above-mentioned step is obtained filters through MPE/IP filter 102 again, just carries out next step if the parameter (TABLE ID, MAC Address and IP address) in the MPE bag is identical, if inequality, just abandons this packet, and repeats step.What obtain through above-mentioned step is a complete UDP/IP bag, and is stored in data fifo buffer 103 and waits for that data transmitting module C do instant the transmission.Follow according to requirement of system design, data fifo buffer 103 is the data storages that can store one or more packets.Data reception module A repeats step.

Data transmitting module C is responsible for data are read the IP packet in FIFO buffer 103, sends terminal equipment 200 to by the ETHERNT interface.Data transmitting module C comprises data transmitter 104 and physical data transmits interface 105.

Claims

1. device that the DVB data in real time receives at a high speed and transmits, comprise a TS receiver, it is characterized in that, this device also comprises a data receiver module (A), a data buffer (B), a data transmitting module (C) three parts, wherein, data reception module (A), its inside comprise TS filter and MPE/IP filter again; Data buffer (B) is a binary channels data fifo buffer, works in the mode of first in first out, can make data reception module (A) and data transmitting module (C) can work simultaneously and do not disturb mutually; Data transmitting module (C), its inside comprise that again data transmitter and physical data transmit interface; Transmit interface by physical data data are sent to terminal equipment.

2. the device that DVB data in real time according to claim 1 receives at a high speed and transmits is characterized in that, described data reception module (A), data buffer (B), data transmitting module (C) are to adopt single FPGA or chip form to realize.

3. the device that DVB data in real time according to claim 1 receives at a high speed and transmits is characterized in that, described physical data forwarder interface is the Ethernet data-interface, and the data of this device output are the UDP/IP bag.

4. the device that DVB data in real time according to claim 1 receives at a high speed and transmits is characterized in that, the core component of described TS receiver is electronics high-frequency digital tuner Tuner.

5. receive at a high speed and conveyer according to claim 1 and 4 described DVB data in real time, it is characterized in that, described high-frequency digital tuner Tuner is the type of DVB-C, or DVB-S type or DVB-T type or CDMB-T type; Wherein the type of DVB-C connects the data of the coaxial cable reception DVB-C of FHC network; The type of DVB-S connects the data that satellite earth antenna receives DVB-S; The type of DVB-T and CDMB-T is connected the data that the surface wave reception antenna receives DVB-T and CDMB-T.

6. DVB data in real time according to claim 1 receives the implementation method with conveyer at a high speed, it is characterized in that: operate according to following steps: a, with the input the DVB signal enter the TS receiver, the treated TS that becomes; The TS that b. will carry the high speed mass data receives, demultiplexing, filtration, decapsulation, is reduced into required IP packet; C. be stored in the data buffer; D. deliver to the physical data forwarder interface by the data transmitter reading of data, be transferred to the terminal equipment of follow-up use data again.

7. DVB data in real time according to claim 6 receives the implementation method with conveyer at a high speed, it is characterized in that: the IP packet that described transmission data can be TS, PS or MPE, it is to send terminal equipment to one way system.