CN103918276B

CN103918276B - Digital broadcast receiver

Info

Publication number: CN103918276B
Application number: CN201180074674.0A
Authority: CN
Inventors: 竹内满; 有田荣治
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2011-11-08
Filing date: 2011-11-08
Publication date: 2017-02-15
Anticipated expiration: 2031-11-08
Also published as: JPWO2013069052A1; DE112011105819T5; CN103918276A; WO2013069052A1; JP5430806B2

Abstract

When it is determined that there are, in the slots of a MOST network (1), slot allocations of the maximum transmission rate that has been allocated to MPEG-TS signals or a greater transmission rate, a packet is read from a buffer (72) at an output transmission rate of the MPEG-TS signals. When the transmission rate of the MOST network (1) is smaller than the output transmission rate of the MPEG-TS signals, a request for increasing the number of allocated slots is made to a management unit, and a packet is read from the buffer after the increase of the number of allocated slots. If the packet read from the buffer (72) includes a PCR, the value of the PCR is changed to a PCR value in accordance with a system clock inputted from a PLL circuit (74) and thereafter the PCR is outputted to the MOST network (1) as an MPEG-TS signal as converted to the protocol of the MOST network (1).

Description

Digital broadcasting transmitter

Technical field

The present invention relates to MOST (Media Oriented Systems Transport：Media guidance system transfers) be The digital broadcasting transmitter being connected with loop network representing.

Background technology

Following device is disclosed in patent documentation 1：I.e. will not be to the content of the MPEG2-TS being inputted with arbitrary transfer rate Cause to damage, and convert thereof into the device of other arbitrary transfer rates.This device includes：Extract PCR from packet (Program Clock Reference：Program clock reference) circuit；Value according to PCR reproduces the system clock of 27MHz PLL circuit；To export the packet reading circuit of transfer rate read data packet；And when packet is for PCR data bag, rewrite Become the PCR value replacement circuit of the PCR value from PLL circuit.Additionally, disclosing following circuit in patent documentation 2：In Japanese number Word broadcast mode is ISDBT (Integrated Services Digital Broadcasting-Terrestrial：Comprehensive clothes Business Digital Broadcasting Terrestrial) used in the transfer approach of multiple framework TS in, by output delete invalid stratum TSP (Transport Stream Packet：Transport stream packet) after signal, to suppress export transfer rate.

Prior art literature

Patent documentation

Patent documentation 1：

Japanese Patent Laid-Open 11-205789 publication

Patent documentation 2：

Japanese Patent Laid-Open 2003-115807 publication

Content of the invention

Invent technical problem to be solved

In recent years, in-vehicle network is that MOST is connected with the multiple equipment of the decoder being built-in with video/audio sometimes, should One of them of equipment is digital broadcasting transmitter.In this case, it is conceivable that in MOST network, collecting video/audio Decoder can bring the cost of network system to decline.

However, it is necessary to video/audio data is directly sent to MOST network in the way of numerical data, therefore exist The oppressed problem of the transmission band of MOST network.For example, because video/audio data has occupied transmission band it is thus possible to Even leading to cannot be carried out it is also possible to lead to there is successional data also with arteries and veins for the overall data transmission of controlling network Punching string (burst) mode is transmitted.

Particularly, video/audio data is that have successional signal, and inapplicable burst mode transmission, therefore straight Connect in the case of being sent to MOST network, may give MOST network be connected other equipment communication timing bring bad Impact, contrary it is also possible to being affected by other equipment and seriality being caused damage.

In addition, patent documentation 1 is the common device with output rating for the input rate of conversion MPEG2-TS, but itself and P2P (Peer to Peer：End-to-end) related, do not envision such as loop network etc multiple equipment and be connected, transmission band is by this The network that a little equipment occupy.Therefore, even if the invention of patent documentation 1 is applied to the such loop network of MOST, but there is also Following problem：That is, it is assigned with TS (Transport Stream：Transmitting stream) signal output lead (network side), its respective amount Data cannot transmit, even if therefore temporarily retain TS output, also can produce shortage of data.

Additionally, the technology of patent documentation 2 may not apply to as DVBT (Digital Video Broadcasting- Terrestrial：Digital video broadcast-terrestrial) so it is not inserted into the broadcast mode of invalid stratum TSP.Accordingly, there exist and ask as follows Topic：Various digital broadcasting modes cannot be tackled, and the transfer rate without successional data cannot be suppressed.

The present invention completes to solve the above problems, and its object is to provide a kind of digital broadcasting transmitter, should The video/audio data of the broadcast singal receiving can be exported to network by digital broadcasting transmitter in numerical data mode, makes Obtain the reproduction equipment being connected with loop network and can suitably reproduce video/audio data.

Solve the technical scheme that technical problem is adopted

Digital broadcasting transmitter involved in the present invention includes broadcast receiver system, and this broadcast receiver system is by will be via sky The broadcast wave that line receives is converted into the tuner of intermediate frequency signal and the letter that intermediate frequency signal is converted into numerical data Road decoder is constituted, this digital broadcasting transmitter and the ring network distribution of number of time slots being managed using administrative unit Network is connected, and this digital broadcasting transmitter is characterised by, including：Buffer, this buffer storage using band decoder by The packet of the digit data stream that intermediate frequency signal is converted to；Testing circuit, this testing circuit detection loop network is Big transfer rate, the information of maximum transfer rate of expression distribution to digit data stream and the time slot allocation situation of loop network； PLL circuit, this PLL circuit is according to the PCR value of packet come playback system clock；Read control circuit, based on by detection electricity The time slot allocation situation of the loop network that road detection obtains, is judged to that the time slot of this loop network has distribution to digit data stream Maximum transfer rate more than time slot distribution in the case of, the maximum transfer rate based on loop network for this read control circuit and Represent that distribution, to the information of the maximum transfer rate of digit data stream, is postponed in the way of the output transfer rate reaching digit data stream Rush device and read out packet, and when the transfer rate of loop network is less than the output transfer rate of digit data stream, this reading control Circuit processed carries out expanding the request of distribution number of time slots to administrative unit, after having expanded distribution number of time slots, from buffer Read data packet；PCR replacement circuit, in the case that the packet reading from buffer includes PCR, this PCR replacement circuit By this PCR be substituted for from PLL circuit input system clock corresponding to PCR value；And protocol conversion circuitry, this protocol conversion Circuit receives the packet from the output of PCR replacement circuit, and the digit data stream as the agreement being converted into loop network And export to this loop network.

Invention effect

According to the present invention, have the effect that：That is, can be by the video/audio data of the broadcast singal receiving with numeral Data mode exports to network so that the reproduction equipment being connected with loop network can suitably reproduce video/audio number According to.

Brief description

Fig. 1 is the figure of the structure representing the loop network being connected with digital broadcasting transmitter involved in the present invention.

Fig. 2 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiment 1.

Fig. 3 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 1.

Fig. 4 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiment of the present invention 2.

Fig. 5 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 2.

Fig. 6 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiment of the present invention 3.

Fig. 7 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 3.

Specific embodiment

Below, in order to be described in more details to the present invention, referring to the drawings embodiments of the present invention are said Bright.

Embodiment 1.

Fig. 1 is the figure of the structure representing the loop network being connected with digital broadcasting transmitter involved in the present invention.Fig. 1 In, digital broadcasting transmitter 2 involved in the present invention is configured on loop network 1.Except Digital Broadcasting Receiver in loop network 1 Beyond machine 2 and administrative unit 3, it is also associated with multiple electronic equipments, these electronic equipments are generically and collectively referred to as other equipment 4.Here, it is assumed that Loop network 1 is MOST network, is suitably recited as MOST network 1.

Administrative unit 3 is the device existing as the manager on network, has and for example utilizes keyboard, remote control etc. each Plant the user interface of input equipment, have and will be dispensed on MOST network 1 by the instruction of user input via this user interface Effect.Administrative unit 3 is had and will be exported by the electronic equipment being connected with MOST network 1, such as digital broadcasting transmitter 2 MPEG-TS signal is converted into the function (video/audio decoding) of video signal, and for prompting the user with video signal Display.Thus, administrative unit 3 accepts the instruction from user, and the distribution carrying out time slot to the equipment on MOST network 1 (divides Join the management of number of time slots) etc., control system is overall.

Fig. 2 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiment 1.In Fig. 2, digital broadcasting connects Receipts machine 2 includes：Tuner 5, channel decoder 6, TS processing department 7 and network I/F portion 8.Tuner 5 will receive via antenna Sub-broadcast ripple signal (RF signal) be converted into intermediate frequency signal (IF signal).Tuned device 5 is changed by channel decoder 6 IF signal afterwards is demodulated, and is converted to MPEG-TS signal.In addition, tuner 5 and channel decoder 6 also can carry out polyphyly System carries.

The TS transfer rate of MPEG-TS signal is converted into corresponding to the maximum transfer rate of MOST network 1 TS processing department 7 Value, generates after the replacement carrying out PCR value, i.e. so-called " machined TS signal ", and is exported.In addition, TS processing department 7 Structure includes：DeMux separating treatment circuit 71, buffer 72, PCR replacement circuit 73, PLL circuit 74 and reading control electricity Road 75.DeMux separating treatment circuit 71 is the MPEG-TS signal inputting from channel decoder 6 to be carried out separate (DeMux), Whether the TS packet to detect MPEG-TS signal is the circuit of PCR data bag.Buffer 72 is storage MPEG-TS signal The buffer of TS packet.

In the case of being PCR data bag from the TS packet that buffer 72 reads, PCR replacement circuit 73 using from The clock value that PLL circuit 74 reads generates PCR, is rewritten to (replacement of PCR value) in this PCR data bag, and exports to network I/F portion 8, beyond TS packet is PCR data bag in the case of, directly output this to network I/F portion 8.

PLL circuit 74 is circuits below：That is, using by DeMux separating treatment circuit 71 from MPEG-TS Signal separator Obtained by PCR value carrying out PLL, and reproduce the system clock of 27MHz.

Read control circuit 75 is circuits below：That is, according to the time slot allocation situation signal inputting from testing circuit 82 Lai Determine the time slot allocation situation of MOST network 1, and control the MPEG-TS signal of buffer 72 according to this time slot allocation situation Read.

Time slot distribution to MOST network 1 is carried out in the following way：That is, the agreement according to this MOST network 1, management is single Unit 3 gives the access right of time slot to digital broadcasting transmitter 2.Testing circuit 82 would indicate that whether MOST time slot is " to distribute The time slot allocation situation signal output of time slot " is to read control circuit 75.

Network I/F portion 8 includes MOST protocol conversion circuitry 81 and testing circuit 82.MOST protocol conversion circuitry 81 will be by " machined TS signal " that TS processing department 7 generates is converted into MOST agreement, and exports to MOST network 1.Testing circuit 82 is right The maximum allocated transfer rate of MOST network 1, distribute the information of maximum transfer rate to MPEG-TS signal and current MOST net The time slot allocation situation of network 1 is detected, and exports to TS processing department 7.

Below, action is illustrated.

Fig. 3 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 1, according to this figure illustrate from MPEG-TS signal input to TS processing department 7 is started, to process to network I/F portion 8 for the output details.

First, DeMux separating treatment circuit 71 separates the MPEG-TS signal (step from channel decoder 6 input ST1).Then, DeMux separating treatment circuit 71 judges whether the TS packet constituting inputted MPEG-TS signal is PCR Packet (step ST2).

(step ST2 in the case that TS packet is PCR data bag：It is), DeMux separating treatment circuit 71 is by PCR The PCR value of packet exports to PLL circuit 74.PLL circuit 74 is using the PCR value from DeMux separating treatment circuit 71 input Carry out PLL, reproduce the system clock (reproducing the reference clock needed for MPEG-TS signal) (step ST3) of 27MHz.

(step ST2 in the case that TS packet is not PCR data bag：No), DeMux separating treatment circuit 71 basis MPEG-TS signal detection goes out its TS transfer rate, and this MPEG-TS signal is stored temporarily in buffer 72.To be divided by DeMux The TS transfer rate obtaining from process circuit 71 detection exports to read control circuit 75.

Additionally, which time time slot the testing circuit 82 in network I/F portion 8 has been grasped by MOST protocol conversion circuitry 81 to The situation that (moment) is allocated, to determine the time slot allocation situation of MOST network 1, and to export to read control circuit 75.

In addition, testing circuit 82 for example judges to transmit how many data according to the time slot allocation situation of MOST network 1, and Calculate average transfer rate (average " vacant " rate).

Then, read control circuit 75 is confirmed whether to have input MPEG-TS signal (step ST4).Do not input MPEG- (step ST4 in the case of TS signal：No), skip output and process.

Then, read control circuit 75, based on the time slot allocation situation signal inputting from testing circuit 82, confirms MOST net The time slot allocation situation (step ST5) of network 1.

Herein, in the case of being judged as that this digital broadcasting transmitter does not guarantee sufficient MOST time slot, read and control electricity Road 75 is judged to that the distribution of MOST time slot is not enough, is in output holding state (step ST5 of TS packet：No), from MOST agreement Change-over circuit 81 to administrative unit 3 output expansion distribution time slot request (step ST9), before being expanded in a period of, TS packet is temporarily stored in (step ST10) in buffer 72, end is processed (after ensure that transmission band, from buffer 72 read and export TS packet).

On the other hand, when guaranteeing to have enough MOST time slots in being judged as MOST network 1, read control circuit 75 judges For being not at output holding state (step ST5 of TS packet：It is), read out TS packet and export to PCR replacement circuit 73.

Whether PCR replacement circuit 73 is PCR data bag to the TS packet reading out from buffer 72 as described above Judged (step ST6).

(step ST5 in the case of not being PCR data bag in the MPEG-TS signal (TS packet) of output：No), PCR replaces Change circuit 73 directly by MPEG-TS signal output to network I/F portion 8 (step ST7).

On the other hand, (step ST5 in the case that the MPEG-TS signal (TS packet) in output is PCR data bag： Be), PCR replacement circuit 73 by from PLL circuit 74, PCR value used in the reproduction of system clock rewrites into this PCR number According to bag (replacement of PCR value), and export to network I/F portion 8 (step ST8).

Then, " the machined TS signal " that input from PCR replacement circuit 73 is converted into by MOST protocol conversion circuitry 81 MOST agreement, and export to MOST network 1.In addition, for " machined TS signal ", temporary after PCR value is replaced as described above When be stored in and adjusted in time the time delay produce in buffer 72, therefore enable corresponding with time delay non-with Step transmission.

In the case of the transmission band deficiency of MOST network 1, export to administrative unit 3 and distribution number of time slots is expanded Request, before being expanded in a period of, temporarily storage TS signal, after ensure that transmission band, export TS signal. In this case, by the replacement of PCR value, temporal information is integrated, special therefore, it is possible to not implement in administrative unit 3 side Process, just reproduced.

As described above, according to embodiment 1, including：Buffer 72, this buffer 72 storage using band decoder 6 from The packet of the MPEG-TS signal that IF signal is converted to；Testing circuit 82, this testing circuit 82 maximum to MOST network 1 Transfer rate, expression distribution are entered to the information of maximum transfer rate of MPEG-TS signal and the time slot allocation situation of MOST network 1 Row detection；PLL circuit 74, this PLL circuit 74 is according to the PCR value of packet come playback system clock；Read control circuit 75, Based on by testing circuit 82 detection obtain MOST network 1 time slot allocation situation, be judged to that the time slot of this MOST network 1 has In the case of distributing the time slot distribution to more than the maximum transfer rate of MPEG-TS signal, this read control circuit 75 is based on MOST The maximum transfer rate of network 1 and the information representing the maximum transfer rate distributing to MPEG-TS signal, to reach MPEG-TS letter Number the mode of output transfer rate read out packet from buffer 72, and this read control circuit 75 is in MOST network 1 When transfer rate is less than the output transfer rate of MPEG-TS signal, expands distribution number of time slots to management unit requests, expanding point After joining number of time slots, from described buffer read data packet；PCR replacement circuit 73, in the data reading from buffer 72 In the case of including PCR, this PCR is substituted for corresponding to the system clock inputting from PLL circuit 74 this PCR replacement circuit 73 PCR value；And MOST protocol conversion circuitry 81, this MOST protocol conversion circuitry 81 receive from PCR replacement circuit 73 output Packet, and as the MPEG-TS signal output being converted into after the agreement of MOST network 1 to this MOST network 1, exist in addition In the case of MOST frequency band cannot be substantially ensured that, this MOST protocol conversion circuitry 81 carries out expansion request.

By said structure, can by the MPEG-TS signal output of the broadcast singal receiving to MOST network 1, so as to Suitably reproduce video/audio data using the administrative unit 3 being connected with MOST network 1.

Embodiment 2.

In embodiment 2, in addition to the structure of above-mentioned embodiment 1, TS processing department according to MPEG-TS signal, to only There is the MPEG-TS signal of video-audio signal, i.e. " local T S " is classified with other data, limit other numbers of output According to.

Fig. 4 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiments of the present invention 2.In addition, Fig. 4 In, mark same-sign in above-mentioned embodiment 1 using the structural element that Fig. 1 illustrates, and omit the description.Embodiment 2 institute The digital broadcasting transmitter 2A being related to is the Digital Broadcasting Receiver being configured on MOST network 1 in the same manner as above-mentioned embodiment 1 Machine, including tuner 5, channel decoder 6, TS processing department 7A and network I/F portion 8A.

TS processing department 7A by from the MPEG-TS signal that channel decoder 6 inputs, only there is video-audio signal Other data beyond " local T S " and video-audio signal are classified, and limit the output of other data.In addition, TS adds Ministry of worker 7A includes DeMux separating treatment circuit 71a, buffer 72, PCR replacement circuit 73, PLL circuit 74, reads control electricity Road 75, data signal buffer 76 and carousel decision circuit 77.

DeMux separating treatment circuit 71a is circuits below：That is, to the MPEG-TS signal inputting from channel decoder 6 Carry out separating (DeMux), be categorized into its beyond " local T S " only with video-audio signal and video-audio signal His data.Other data for example have EPG (electronic program guiding) etc..

Additionally, DeMux separating treatment circuit 71a and the DeMux separating treatment circuit shown in above-mentioned embodiment 1 71 similarly detection MPEG-TS signal TS packet whether be PCR data bag, and by the PCR value of PCR data bag export to PLL circuit 74.

Data signal buffer 76 is in other data that storage DeMux separating treatment circuit 71a classification obtains, quilt The buffer of the data of carousel transmission (repeatedly transmitting identical content with some cycles).Additionally, the management only on MOST network 1 In the case that unit 3 or other equipment 4 make requests on, read out the data being stored in data signal buffer 76, and warp Exported to MOST network 1 by network I/F portion 8A.

Carousel decision circuit 77 is circuits below：That is, from by DeMux separating treatment circuit 71a classification obtain other Judge in data to carry out the data of carousel transmission.

Network I/F portion 8A includes MOST protocol conversion circuitry 81a, testing circuit 82 and MOST command analysis circuit 83. " machined TS signal " of being generated by TS processing department 7A is turned in the same manner as above-mentioned embodiment 1 by MOST protocol conversion circuitry 81a Change MOST agreement into, and export to MOST network 1.Additionally, MOST protocol conversion circuitry 81a will be read from data signal buffer 76 The data conversion got becomes MOST agreement, and exports to MOST network 1, and the data output that will receive from MOST network 1 To MOST command analysis circuit 83.MOST command analysis circuit 83 is from the data inputting via MOST protocol conversion circuitry 81a In extract order, the circuit that parsed of content to order.

Then action is illustrated.

Fig. 5 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 2, explains in detail according to this figure State from by MPEG-TS signal input from the beginning of TS processing department 7A, to process to network I/F portion 8 for the output.

First, DeMux separating treatment circuit 71a carries out to the MPEG-TS signal inputting from channel decoder 6 separating (step ST1a).Then, DeMux separating treatment circuit 71a accords with the TS data judging MPEG-TS signal based on identification of data packets Whether bag is video/audio packet (step ST2a).

(step ST2a in the case that TS packet is not video/audio packet：No), DeMux separating treatment electricity Road 71a exports this TS packet to carousel decision circuit 77.

The packet based on the TS packet inputting via DeMux separating treatment circuit 71a for the carousel decision circuit 77 is known Do not accord with, judge whether TS packet is by the data (step ST3a) of carousel transmission.It is by carousel transmission in TS packet Data in the case of (step ST3a：It is), carousel decision circuit 77, will by the classification of the data being transmitted in this TS packet In data Cun Chudao data signal buffer 76 (step ST4a).

Additionally, MOST command analysis circuit 83 extracts and inputs from MOST network 1 via MOST protocol conversion circuitry 81a The order comprising in data, and the content of resolve command.Herein, when order carrys out the number of self-management unit 3 or other equipment 4 According to during request, MOST command analysis circuit 83 judges single with the presence or absence of management in the data being stored in data signal buffer 76 The data (step ST5a) of the data category of unit 3 or other equipment 4 request.

(step ST5a in the case of there is the data of data category of administrative unit 3 or other equipment 4 request： Be), MOST command analysis circuit 83 to data signal buffer 76 instruction read out the data of this data category and export to MOST protocol conversion circuitry 81a.Data signal buffer 76 according to the instruction of MOST command analysis circuit 83, by administrative unit 3 Or the data output of the data category of other equipment 4 request is to MOST protocol conversion circuitry 81a.

In step ST6a, the data conversion inputting from data signal buffer part 76 is become by MOST protocol conversion circuitry 81a MOST agreement, and export to MOST network 1.

Additionally, in the case that TS packet is video/audio packet (step ST2a：It is), at DeMux separation Reason circuit 71a judges whether TS packet is PCR data bag.Then, execution is from step ST3 of Fig. 3 is to step ST8 Reason, the data conversion of video/audio packet is become MOST agreement, and exports to MOST network 1.

As described above, according to present embodiment 2, including：At DeMux separating treatment circuit 71a, this DeMux separate Circuit 71a is from the MPEG-TS signal being converted to by IF signal using channel decoder 6 for reason, will be with video and voice data The packet of related packet and other data carries out separating；Carousel decision circuit 77, this carousel decision circuit 77 from DeMux separating treatment circuit 71a separates and judges in other data obtaining to carry out the data of carousel transmission；Data signal buffers Portion 76, this data signal buffer part 76 by be judged to by carousel decision circuit 77 to carry out the packet of the data of carousel transmission with The corresponding mode of its data category is stored；And MOST command analysis circuit 83, this MOST command analysis circuit 83 is right Parsed via the command context that MOST network 1 receives, be that the equipment being connected with MOST network is sent in command context , specify data category data sending request in the case of, this MOST command analysis circuit 83 is from data signal buffer 76 Read out the packet of the data corresponding with this data sending request, and export to MOST protocol conversion circuitry 81a, MOST assists The view change-over circuit 81a packet that read from data signal buffer 76 by MOST command analysis circuit 83 of reception, as turning Change the MPEG-TS signal output after the agreement of MOST network 1 into this MOST network 1.Thus, to needing synchronous driving to regard Frequency domain audio data is classified with other data, only when existing from the request of network side, will enter road wheel in other data The data output broadcasting transmission, to MOST network 1, therefore can suppress the transfer rate of the data without synchronous driving.

Embodiment 3

In embodiment 3, following manner is illustrated：That is, in being equipped with of being made up of tuner and tuning decoder In the digital broadcasting transmitter of multiple broadcast receiver systems, using the MPEG- inputting from above-mentioned multiple broadcast receiver systems respectively TS signal is unifying shared information, and is multiplexed into MPEG-TS signal again, that is, so-called " multiplexes again (remultiplexing) mode ".

Fig. 6 is the block diagram of the structure representing the digital broadcasting transmitter involved by embodiments of the present invention 3, shows and takes It is loaded with the situation of two broadcast receiver systems.In Fig. 6, mark phase in above-mentioned embodiment 1 using the structural element that Fig. 1 illustrates Same symbol, and omit the description.Digital broadcasting transmitter 2B involved by embodiment 3 is to join in the same manner as above-mentioned embodiment 1 It is placed in the digital broadcasting transmitter on MOST network 1, including：The broadcast receiver system of tuner 5 and channel decoder 6 composition, Broadcast receiver system, TS processing department 7B and network I/F portion 8 that tuner 5a and channel decoder 6a is constituted.In addition, tuner 5a is and tuner 5 identical tuner that the RF signal receiving via antenna is converted into IF signal.Channel decoder 6a It is and channel decoder 6 identical decoder that the IF signal after changing tuned device 5a is demodulated, and is converted into MPEG- TS signal.

TS processing department 7B is by from channel decoder 6 and the MPEG-TS signal of this two systems of channel decoder 6a input Transfer rate is converted into the value corresponding with the maximum transfer rate of MOST network 1, generates and export the institute after having carried out PCR value replacement " the machined TS signal " of meaning.The structure of TS processing department 7B includes：DeMux separating treatment circuit 71b, buffer 72, PCR replace Change TS multiplex electronics 78, PLL circuit 74 and read control circuit 75 again.DeMux separating treatment circuit 71b be with Lower circuit：That is, the MPEG-TS signal inputting from channel decoder 6 and channel decoder 6a respectively is carried out separating (DeMux), Detect whether MPEG-TS signal is PCR data bag.

PCR replace TS again multiplex electronics 78 to defeated with the two systems of channel decoder 6a from channel decoder 6 In the MPEG-TS signal entering, identical table information is uniformly processed,

Generate the TS signal again these MPEG-TS signals being compiled into again a MPEG-TS signal, multiplex again TS.Additionally, PCR replaces TS, and multiplex electronics 78 are being read from buffer 72 in the same manner as PCR replacement circuit 73 again In the case that output data packet is PCR data bag, generated using the clock value reading from PLL circuit 74 PCR and rewrite into This PCR data bag (replacement of PCR value), and exporting to network I/F portion 8, beyond being PCR data bag in the case of, directly defeated Go out to network I/F portion 8.

In addition, defining table information in MPEG-TS signal, this table information represents the program included in MPEG-TS signal And constitute the relation between the program key elements such as the video of program, audio stream.This table information is referred to as PSI (Program Specific Information：Program certain detail information).PCR replace TS again multiplex electronics 78 with reference to respectively from two Table information (PSI) included in the MPEG-TS signal of individual broadcast receiver system input, unitizes to identical table information Process, the MPEG-TS signal defining these table information is compiled into a MPEG-TS signal each other again.

Then action is illustrated.

Fig. 7 is the flow chart of the action representing the digital broadcasting transmitter involved by embodiment 3, explains in detail according to this figure State and start to output the process to network I/F portion 8 from the MPEG-TS signal input by two systems to TS processing department 7B.

First, DeMux separating treatment circuit 71b is to inputting from channel decoder 6 and channel decoder 6a respectively MPEG-TS signal carries out separating (step ST1b).Then, DeMux separating treatment circuit 71b judges these MPEG-TS signals TS packet whether be PCR data bag (step ST2b).

(step ST2b in the case that TS packet is PCR data bag：It is), DeMux separating treatment circuit 71b will The PCR value of PCR data bag exports to PLL circuit 74.PLL circuit 74 is using from DeMux separating treatment circuit 71b input PCR value carries out PLL, reproduces the system clock (reproducing the reference clock needed for MPEG-TS signal) (step ST3b) of 27MHz.

(step ST2b in the case that TS packet is not PCR data bag：No), DeMux separating treatment circuit 71b root Detect its TS transfer rate respectively according to the MPEG-TS signal of two systems, these MPEG-TS signals are temporarily stored in buffer In 72.The transfer rate of the TS signal being detected using DeMux separating treatment circuit 71b is exported to read control circuit 75.

The testing circuit 82 in network I/F portion 8 passes through MOST protocol conversion circuitry 81 grasps be currently in use which time time slot (moment), determine the time slot allocation situation of MOST network 1, and export to read control circuit 75.

According to the time slot allocation situation of MOST network 1, testing circuit 82 for example judges whether MPEG-TS signal has energy The enough transmission bands being exported.

Then, read control circuit 75 judges whether to have input MPEG-TS signal (step ST4b), afterwards, based on from The time slot allocation situation information of testing circuit 82 input, confirms the time slot allocation situation (step ST5b) of MOST network 1.

Herein, there is no enough transmission bands in being judged as other equipment 4 using MOST time slot, current MOST network 1 When, read control circuit 75 is judged to be in output holding state (step ST5b of TS packet：No), do not read from buffer 72 Take TS packet.MOST protocol conversion circuitry 81 carries out to administrative unit 3 expanding the request (step of distribution number of time slots ST10b), MPEG-TS signal is temporarily stored in (step ST11b) in buffer 72.

On the other hand, there is enough transmission bands in being judged as current MOST network 1 (according to above-mentioned request, time slot It is allocated to the situation etc. of administrative unit 3), read control circuit 75 is judged to be not at the output holding state of TS packet (step ST5b：It is).

In the case that average " vacant " rate wants little than MOST network in the TS transfer rate of MPEG-TS signal, read and control electricity Road 75 obtains and is assigned to the maximum transfer rate detecting the MPEG-TS signal obtaining in testing circuit 82, and controls buffer 72, will It is below average " vacant " rate of MOST network and distribute and be set as exporting transfer rate to the maximum transfer rate of this MPEG-TS signal, TS packet is read with this output transfer rate, and exports to PCR replacement TS multiplex electronics 78 again.

Additionally, in the case that the transfer rate of MPEG-TS signal is more than average " vacant " rate of MOST network, in MOST association After the time slot distribution expansion request carrying out in view change-over circuit 81 is licensed, read control circuit 75 controls buffer 72, reads Take out TS packet, and export to PCR replacement TS multiplex electronics 78 again.

PCR replaces TS, and multiplex electronics 78 judge the TS packet reading as described above from buffer 72 again Whether it is PCR data bag (step ST6b).

(step ST6b in the case of being PCR data bag in the MPEG-TS signal (TS packet) of output：It is), PCR replaces Change TS again multiplex electronics 78 by from PLL circuit 74, PCR value used in the reproduction of system clock rewrite into PCR data bag (replacement of PCR value) (step ST9b).

(step ST6b in the case of not being PCR data bag in the MPEG-TS signal (TS packet) of output：No), or In the case of PCR data bag being rewritten by the PCR value that PLL circuit 74 reproduces in step ST8b, if broadcasting from two respectively The content of the table information that the MPEG-TS signal of reception system input is comprised is identical, then PCR replaces TS and multiplexes The table information unification of these MPEG-TS signals is become a table information by circuit 78, and MPEG-TS signal is compiled into each other again one Individual MPEG-TS signal (TS multiplexes again) (step ST7b).

PCR replaces MPEG-TS signal output after TS is multiplexed by multiplex electronics 78 more again for the TS to network I/F Portion 8 (step ST8b).If additionally, the content of table information differs, MPEG-TS signal is directly output to network I/F portion 8.

Then, MOST protocol conversion circuitry 81 turns replacing the TS TS signal that multiplex electronics 78 input again from PCR Change MOST agreement into, and export to MOST network 1.In addition, for this TS signal, being temporarily stored in after being replaced due to PCR value The time delay producing in buffer 72 is adjusted in time, therefore enables the asynchronous transmission of time delay.

As described above, according to present embodiment 3, possessing multiple broadcast receiver systems, multichannel is multiple again to replace TS including PCR With circuit 78, for respectively from the MPEG-TS signal of multiple broadcast receiver systems input, there is the shared information (table such as PSI Information) MPEG-TS signal, this PCR replace TS again multiplex electronics 78 this shared information is unified into one, will have The MPEG-TS signal of shared information is compiled into a stream again.By said structure, will input from multiple broadcast receiver systems respectively MPEG-TS signal be unified into shared information, be multiplexed into MPEG-TS signal again, thus, can reduce reproduction multiple programs Required transfer rate.

Additionally, the present invention can carry out independent assortment to each embodiment in the range of this invention, or to each embodiment party The arbitrary structures key element of formula carries out deforming or omits arbitrary structural element in each embodiment.

Industrial practicality

Digital broadcasting transmitter involved in the present invention can be by the video/audio data of the broadcast singal receiving with number The mode of digital data is exported to network so that video sound can suitably be reproduced using the reproduction equipment being connected with loop network Frequency evidence, is therefore applied to the vehicle-mounted digital broadcasting transmitter being connected with in-vehicle networks such as MOST.

Label declaration

1 loop network (MOST network), 2,2A, 2B digital broadcasting transmitter, 3 administrative units, 4 other equipments, 5,5a adjust Humorous device, 6,6a channel decoder, 7,7A, 7B TS processing department, 8,8A network I/F portion, 71,71a, 71b DeMux separating treatment Circuit, 72 buffers, 73PCR replacement circuit, 74PLL circuit, 75 read control circuits, 76 data signal buffers, 77 carousels Decision circuit, 78PCR replace TS again multiplex electronics, 81,81a MOST protocol conversion circuitry, 82 testing circuits, 83MOST command analysis circuit.

Claims

1. a kind of digital broadcasting transmitter, including broadcast receiver system, this broadcast receiver system is by will receive via antenna Broadcast wave is converted into the tuner of intermediate frequency signal and the channel decoding that described intermediate frequency signal is converted into numerical data Device is constituted, and this digital broadcasting transmitter is connected with using the loop network that administrative unit is managed to the distribution of number of time slots Connect it is characterised in that including：

Buffer, the numerical data that the storage of this buffer is converted to by described intermediate frequency signal using described channel decoder The packet of stream；

Testing circuit, this testing circuit detects the maximum transfer rate of described loop network, represents distribution to described digit data stream The information of maximum transfer rate and described loop network time slot allocation situation；

PLL circuit, this PLL circuit is according to the PCR value of described packet come playback system clock；

Read control circuit, in the time slot allocation situation based on the described loop network being obtained by the detection of described testing circuit, sentences The time slot being set to this loop network has a case that to distribute the time slot distribution to more than the maximum transfer rate of described digit data stream Under, the maximum transfer rate based on described loop network for the described read control circuit and represent distribution to described digit data stream The information of maximum transfer rate, reads out number from described buffer in the way of the output transfer rate reaching described digit data stream According to bag, and when the transfer rate of described loop network is less than the output transfer rate of described digit data stream, described reading controls Circuit carries out expanding the request of distribution number of time slots to described administrative unit, after having expanded distribution number of time slots, from described Buffer read data packet；

PCR replacement circuit, in the case of including PCR from the packet that described buffer reads, this PCR replacement circuit will This PCR is substituted for the PCR value corresponding to from the described system clock of described PLL circuit input；And

Protocol conversion circuitry, this protocol conversion circuitry receive from described PCR replacement circuit output packet, and as turn Change the digit data stream of the agreement of described loop network into and export to this loop network.

2. digital broadcasting transmitter as claimed in claim 1 is it is characterised in that include：

Separating treatment circuit, this separating treatment circuit is from being converted to by described intermediate frequency signal using described channel decoder Digit data stream in, separate the packet of the packet related to video and voice data and other data；

Decision circuit, this decision circuit judges to carry out carousel from other data described in the separation of described separating treatment circuit obtains The data of transmission；

Data signal buffer part, this data signal buffer part will be judged to by described decision circuit carry out the data of carousel transmission Packet is stored in the way of corresponding with other data categories；And

Command analysis circuit, this command analysis circuit parses to via the command context that described loop network receives, Command context is in the case of data sending request equipment, specifying data category being connected with described carousel network, Read out the packet of the data corresponding with this data sending request from described data signal buffer, and export to described association View change-over circuit,

The packet that described protocol conversion circuitry reception is read from described data signal buffer by described command analysis circuit, And to export to this loop network as the digit data stream being converted into after the agreement of described loop network.

3. digital broadcasting transmitter as claimed in claim 1 or 2 it is characterised in that

Possess multiple described broadcast receiver systems,

Work out processing unit again including stream, for respectively from the digit data stream that multiple described broadcast receiver systems input, tool There is the digit data stream of shared information, this stream is worked out processing unit again and this shared information is unified into one, will have described sharing The digit data stream of information is compiled into a stream again.