CN103237244A - Vehicle-mounted ATSC (Advanced Television Systems Committee) digital television receiver capable of shortening startup time - Google Patents
Vehicle-mounted ATSC (Advanced Television Systems Committee) digital television receiver capable of shortening startup time Download PDFInfo
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Abstract
The invention relates to a vehicle-mounted ATSC (Advanced Television Systems Committee) digital television receiver capable of shortening startup time, which comprises an ATSC signal detection module, a demultiplexing module, a video uncompressing module, a dynamic random access memory, a flash memory and a main controller. The main controller controls a demultiplexer to work according to ATSC broadcasting signal intensity which is received from the ATSC signal detection module. When the digital television receiver is started up, the main controller controls the video uncompressing module to load uncompressing program codes to enable the video uncompressing module to have an uncompressing operation function, and transfers compressed data in the flash memory to the dynamic random access memory to uncompress the data through the video uncompressing module. By using the vehicle-mounted ATSC digital television receiver capable of shortening startup time, when the intensity of broadcasting signals is weak, the demultiplexing and the playing of insignificant broadcasting signals are stopped; and moreover, when the digital television receiver is started up, the load of the main controller is reduced and the startup time is effectively improved.
Description
Technical field
The present invention relates to the ATSC digital TV field, relate in particular to a kind of vehicle-mounted ATSC digital television receiver that shortens the available machine time.
Background technology
The English full name of ATSC is the Advanced Television Systems Committee(U.S. advanced television management consultant committee), this committee formally passes through ATSC Digital Television national standard September 15 nineteen ninety-five.ATSC information source coding processed adopts MPEG-2 video compression and AC-3 audio compression, and chnnel coding adopts the VSB modulation, provides two kinds of patterns: terrestrial broadcasting pattern (8VSB) and High Data Rate pattern (16VSB).Pass through to improve the ATSC standard in the prior art, introduce the adaptive array antenna technology and propose the fast uniform algorithm, improve ATSC DTV and moved receptivity, the ATSC digital television receiver is widely used on the various mobile receiving terminals, as vehicle-mounted ATSC digital television receiver.
But, in using vehicle-mounted ATSC digital television receiver, following problem has appearred: at first, when the ATSC signal quality that receives is relatively poor, the ATSC digital television receiver is still carried out insignificant demultiplexing and the broadcast work of digital television program in the ATSC signal, bring bad audiovisual impression to the user, increased the energy consumption of system again; Secondly, general vehicle-mounted ATSC digital television receiver uses embedded system to realize, memory span is more limited, the common graphic file that data volume is big or program code data are compressed in nonvolatile memory such as the flash memory stores with conserve storage, and when system boot, need master controller to the data decompression of compression, so just for master controller has increased load, reduced the available machine time of system.
Therefore, need a kind of vehicle-mounted ATSC digital television receiver that shortens the available machine time, can be when the ATSC signal quality that receives be relatively poor, stop meaningless demultiplexing and broadcast work, to save system energy consumption, again can be when system boot, use the idle video decompressor of start-up phase to substitute master controller and carry out the big graphic file of data volume or the decompression work of program code data, deduct the master controller load, improve the available machine time of system.
Summary of the invention
In order to address the above problem, the invention provides a kind of vehicle-mounted ATSC digital television receiver that shortens the available machine time, the ATSC signal quality that receives by real-time detection, whether decision proceeds the demultiplexing of the audio frequency and video time of digital television program in the ATSC signal, decompress and broadcast work, the reception of scientific management digital television signal and processing, to avoid bringing bad audiovisual sensation to the user, and when system boot, in order to improve the available machine time of system, using the idle video decompressor of start-up phase to substitute master controller carries out the big graphic file of data volume or the decompression work of program code data, after definite decompression work finishes, video decompressor continues normal video decompression operation, science is distributed existing control resource, has improved the complete machine performance of system.
According to an aspect of the present invention, a kind of vehicle-mounted ATSC digital television receiver that shortens the available machine time is provided, comprise the ATSC signal detection module, demultiplexing module, the video decompression module, dynamic random access memory, flash memories and master controller, described master controller connects described ATSC signal detection module, demultiplexing module, the video decompression module, dynamic random access memory, flash memories, control the work of described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module, and when described digital television receiver starts, control described video decompression module and be written into the gunzip code, make described video decompression module have the calculation function of decompression, and the packed data in the flash memories transferred in the dynamic random access memory decompress for the video decompression module.
More specifically, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: the ATSC tuner becomes intermediate frequency, filtering, amplification, analog-to-digital conversion operation to the ATSC digital TV broadcast signal that receives; The ATSC signal detection module is determined and is exported corresponding ATSC broadcast signal strength according to the ATSC digital TV broadcast signal that receives; Demodulator, connect described ATSC tuner, the signal of described ATSC tuner output carried out carrier lock decode with detections synchronously, NTSC interference filter, channel equalization, Phase Tracking, trellis, deinterleaved, RS decodes and data are gone at random, output transport stream TS flows; Demultiplexing module, connect described demodulator and carry out demultiplexing with the TS stream with described demodulator output, outputting audio data TS stream, video data TS stream, additional data TS stream, described voice data TS stream, video data TS stream, additional data TS stream have different Packet Identifier PID, and described PID is the be responsible for assigning identifier of different value of different types of data in the TS stream; The audio decompression module connects described demultiplexing module to receive described voice data TS stream, and described voice data TS stream is decompressed, and the voice data after decompressing with acquisition is play corresponding audio content for loud speaker; The video decompression module connects described demultiplexing module to receive described video data TS stream, and described video data TS stream is decompressed, and the video data after decompressing with acquisition shows corresponding video content for display; The additional data decoder module, connect described demultiplexing module to receive described additional data TS stream, described additional data TS stream is decoded, to obtain decoded additional data, described additional data comprises the data of independently data service, also comprises the data relevant with described audio content, described video content; Dynamic random access memory is used for data are carried out dynamic randon access; Flash memories is used for graphic file or program code data after the described digital television receiver of storage moves required compression; Outer input interface receives the user by the control information of remote control or button input; Master controller, connect described ATSC signal detection module, demultiplexing module, the audio decompression module, the video decompression module, the additional data decoder module, dynamic random access memory, flash memories and outer input interface, control information according to the outer input interface reception, control audio decompression module, the operation of video decompression module and additional data decoder module, and control the work of described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module, master controller is also when described digital television receiver starts, control described video decompression module and be written into the gunzip code, make described video decompression module have the calculation function of decompression, described master controller is transferred to a part of data in the described flash memories in the described dynamic random access memory, decompress for described video decompression module, deposit data after the decompression is in described dynamic random access memory, do not read when described video decompression module before the end character code of packed data of described flash memories, the notice master controller continues from described flash memories transferring data in described dynamic random access memory, continue to decompress for described video decompression module, read the end character code of the packed data of described flash memories up to described video decompression module, described video decompression module begins the decompression of described video data TS stream; Wherein, the work that described master controller is controlled described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module comprises, when described ATSC broadcast signal strength is less than or equal to 60dBuV, stop the de-multiplex operation of described demodulation multiplexer, when described ATSC broadcast signal strength returns to greater than 60dBuV, recover the de-multiplex operation of described demodulation multiplexer; Wherein, TS stream is made up of packet header and load, described packet header comprises a sync byte SYNC1 and three other bytes, described three other bytes are used for traffic identification, scrambling and control information, described load comprises the MPEG-2 data of 184 bytes, specifically being distributed as of three other bytes in described TS stream packet header, 1 transmission error code indication bit position, 1 net amount is according to initial indication bit position, unit, 1 is transmitted the priority bit position, 13 bag identifier PID bits, 2 are transmitted scrambling control bit position, control bit position, 2 self adaptation districts and 4 continuous counter bits.
More specifically, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described loud speaker is the left and right acoustic channels loud speaker, described display is LCD, and the resolution of described LCD is any one in 160 * 128,384 * 320,640 * 480 or 1024 * 600.
More specifically, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described vehicle-mounted ATSC digital television receiver is vehicle-mounted ATSC set-top box.
More specifically, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: the audio-video signal connection interface module, adopt fpga chip to realize being connected of audio-video signal of compatible DVI, HDMI and DisplayPort form, described fpga chip is the EP2C5Q208C8N of ALTERA company.
More specifically, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described and video data, the relevant data of voice data are caption datas.
Description of drawings
Below with reference to accompanying drawing embodiment of the present invention are described, wherein:
The block diagram of the vehicle-mounted ATSC digital television receiver of the shortening available machine time that Fig. 1 illustrates according to an embodiment of the present invention.
Wherein, 1, ATSC tuner; 2, ATSC signal detection module; 3, demodulator; 4, demultiplexing module; 5, video decompression module; 6, audio decompression module; 7, additional data decoder module; 8, DRAM; 9, flash memory; 10, master controller; 11, outer input interface.
Embodiment
Below with reference to accompanying drawings the embodiment that shortens the vehicle-mounted ATSC digital television receiver of available machine time of the present invention is elaborated.
Fig. 1 illustrates the block diagram of the vehicle-mounted ATSC digital television receiver of the shortening available machine time that illustrates according to an embodiment of the present invention.Wherein be used to user vehicle to provide the vehicle-mounted ATSC digital television receiver of the shortening available machine time of TV service to comprise, ATSC signal detection module 2, demultiplexing module 4, video decompression module 5, dynamic random access memory 8, flash memories 9 and master controller 10, described master controller 10 connects described ATSC signal detection module 2, demultiplexing module 4, video decompression module 5, dynamic random access memory 8, flash memories 9, control the work of described demodulation multiplexer 4 according to the ATSC broadcast signal strength that receives from described ATSC signal detection module 2, and when described digital television receiver starts, control described video decompression module 5 and be written into the gunzip code, make described video decompression module 5 have the calculation function of decompression, and the packed data in the flash memories 9 is transferred in the dynamic random access memory 8 for 5 decompressions of video decompression module.Further, described vehicle-mounted ATSC digital television receiver also comprises, ATSC tuner 1 becomes intermediate frequency, filtering, amplification, analog-to-digital conversion operation to the ATSC digital TV broadcast signal that receives; ATSC signal detection module 2 is determined and is exported corresponding ATSC broadcast signal strength according to the ATSC digital TV broadcast signal that receives; Demodulator 3, connect described ATSC tuner 1, the signal of described ATSC tuner 1 output carried out carrier lock decode with detections synchronously, NTSC interference filter, channel equalization, Phase Tracking, trellis, deinterleaved, RS decodes and data are gone at random, output transport stream TS flows; Demultiplexing module 4, connect described demodulator 3 and carry out demultiplexing with the TS stream with described demodulator 3 outputs, outputting audio data TS stream, video data TS stream, additional data TS stream, described voice data TS stream, video data TS stream, additional data TS stream have different Packet Identifier PID, and described PID is the be responsible for assigning identifier of different value of different types of data in the TS stream; Audio decompression module 6 connects described demultiplexing module 4 to receive described voice data TS stream, and described voice data TS stream is decompressed, and the voice data after decompressing with acquisition is play corresponding audio content for loud speaker; Video decompression module 5 connects described demultiplexing module 4 to receive described video data TS stream, and described video data TS stream is decompressed, and the video data after decompressing with acquisition shows corresponding video content for display; Additional data decoder module 7, connect described demultiplexing module 4 to receive described additional data TS stream, described additional data TS stream is decoded, to obtain decoded additional data, described additional data comprises the data of independently data service, also comprises the data relevant with described audio content, described video content; Dynamic random access memory 8 is used for data are carried out dynamic randon access; Flash memories 9 is used for graphic file or program code data after the described digital television receiver of storage moves required compression; Outer input interface 11 receives the user by the control information of remote control or button input; Master controller 10, connect described ATSC signal detection module 2, demultiplexing module 4, audio decompression module 6, video decompression module 5, additional data decoder module 7, dynamic random access memory 8, flash memories 9 and outer input interface 11, control information according to outer input interface 11 receptions, control audio decompression module 6, the operation of video decompression module 5 and additional data decoder module 7, and control the work of described demodulation multiplexer 4 according to the ATSC broadcast signal strength that receives from described ATSC signal detection module 2, master controller 10 is also when described digital television receiver starts, control described video decompression module 5 and be written into the gunzip code, make described video decompression module 5 have the calculation function of decompression, described master controller 10 is transferred to a part of data in the described flash memories 9 in the described dynamic random access memory 8, decompress for described video decompression module 5, deposit data after the decompression is in described dynamic random access memory 8, do not read when described video decompression module 5 before the end character code of packed data of described flash memories 9, notice master controller 10 continues from described flash memories 9 transferring data in described dynamic random access memory 8, continue to decompress for described video decompression module 5, read the end character code of the packed data of described flash memories 9 up to described video decompression module 5, the decompression of the described video data TS stream of described video decompression module 5 beginnings; Wherein, the work that described master controller 10 is controlled described demodulation multiplexer 4 according to the ATSC broadcast signal strength that receives from described ATSC signal detection module 2 comprises, when described ATSC broadcast signal strength is less than or equal to 60dBuV, stop the de-multiplex operation of described demodulation multiplexer 4, when described ATSC broadcast signal strength returns to greater than 60dBuV, recover the de-multiplex operation of described demodulation multiplexer 4; Wherein, TS stream is made up of packet header and load, described packet header comprises a sync byte SYNC1 and three other bytes, described three other bytes are used for traffic identification, scrambling and control information, described load comprises the MPEG-2 data of 184 bytes, specifically being distributed as of three other bytes in described TS stream packet header, 1 transmission error code indication bit position, 1 net amount is according to initial indication bit position, unit, 1 is transmitted the priority bit position, 13 bag identifier PID bits, 2 are transmitted scrambling control bit position, control bit position, 2 self adaptation districts and 4 continuous counter bits.
Wherein, DRAM(Dynamic Random Access Memory), namely dynamic random access memory is the most common Installed System Memory.DRAM can only keep the very short time with data.In order to keep data, DRAM uses capacitance stores, so must refresh once every a period of time, if memory cell is not refreshed, canned data will be lost.Flash memory (Flash Memory) is the memory of a kind of long-life non-volatile (still can keep institute's data information stored under powering-off state), and data deletions is not to be unit with single byte but to be that (note: NOR Flash is bytes store in unit with fixing block.), the block size is generally 256KB to 20MB.Flash memory is the mutation of electronics erasable read-only memory (EEPROM), and what flash memory was different with EEPROM is, he can byte-level delete and rewriting rather than entire chip erasable, flash memory is just fast than the renewal speed of EEPROM like this.Because its outage the time still can be preserved data, flash memory is used to preserve configuration information usually, as at the basic input/output routine of the BIOS(of computer), the PDA(personal digital assistant), preservation data etc. in the digital camera.
Wherein, the ATSC system replaces the most frequently used TSC-system formula in North America.Under the ATSC standard, hd-tv can produce the wide screen 16:9 picture dimension up to 1920 * 1080 pixels, surpasses six times of standard display resolution in the early time.Yet the picture of many different sizes also has support, so can be broadcast at an existing TV station 6 megahertz channels up to the sub-channel of six standards parsings.ATSC is also proud in its theater quality sound, because it adopts Dolby Digital AC-3 form, provides 5.1 loopbacks stereo.The service of numerous auxiliary data transmission broadcasting may also can provide.As the required whole channel that takies of ATSC system, when the TV station that uses ATSC also wants to keep anaiog signal, must broadcast the channel two separation.The current operating position of ATSC is that the U.S., Canada, Mexico, Korea S and Honduras use; Taiwan is of short duration test ATSC once, and the platform apparent was once relayed the tenth presidential inauguration ceremony of the Republic of China with the HDTV of this system in 2000, but only for Yang Ming Shan bamboo lake cell site's reception scope, the back is undesirable because of the reception that action receives, and changes into and uses DVB-T.
In addition, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described loud speaker is the left and right acoustic channels loud speaker, described display is LCD, and the resolution of described LCD is any one in 160 * 128,384 * 320,640 * 480 or 1024 * 600.Can be according to user's needs and economic capability, the display of design different resolution is selected use for the different user mass selection.
In addition, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described vehicle-mounted ATSC digital television receiver is vehicle-mounted ATSC set-top box.Described vehicle-mounted ATSC set-top box receives the ATSC broadcast singal by the wireless receiving mode, and can be as the carrier that communicates with other network equipments and data-interface.
In addition, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: the audio-video signal connection interface module, adopt fpga chip to realize being connected of audio-video signal of compatible DVI, HDMI and DisplayPort form, described fpga chip is the EP2C5Q208C8N of ALTERA company.
Wherein, FPGA has adopted logical cell array LCA(Logic Cell Array) such concept, inside comprises configurable logic blocks CLB(Configurable Logic Block), output input module IOB(Input Output Block) and three parts of interconnector (Interconnect).Field programmable gate array (FPGA) is programming device, compares with traditional logic circuit and gate array (as PAL, GAL and CPLD device), and FPGA has different structures.FPGA utilizes small-sized look-up table, and (16 * 1RAM) realize combinational logic, each look-up table is connected to the input of a d type flip flop, trigger drives other logical circuits again or drives I/O, constituted the basic logic unit module that not only can realize combination logic function but also can realize the sequential logic function thus, these intermodules utilize metal connecting line to be connected to each other or are connected to the I/O module.The logic of FPGA realizes by loading programming data to inner static storage cell, being stored in value in the memory cell has determined between the logic function of logical block and each module or the connecting mode between module and I/O, and final decision the FPGA function that can realize, FPGA allows unlimited programming.
Wherein, DVI, HDMI, DisplayPort are digital audio/video interface standards common on the market.DVI(Digital Visual Interface), it is digital visual interface, by Silicon Image, Intel(Intel), the Compaq(Compaq), IBM, HP(Hewlett-Packard), NEC, Fujitsu companies such as (Fujitsu) forms DDWG(Digital Display Working Group jointly, numeral shows working group) in the interface standard of release in 1999, DVI is based on the PanalLink interfacing, based on the TMDS(transition minimized differential signaling) electronic protocol is as being electrically connected substantially, the highest signal transmission code stream is 1.65Gbps, analog video interface before comparing, it is fast that it has speed, picture is clear, support the characteristics of HDCP agreement.HDMI(High Definition Multimedia Interface); it is HDMI (High Definition Multimedia Interface); by Hitachi; Panasonic; the Philip; Silicon Image; Sony; Thomson; the common HDMI high-definition media interface of setting up of 7 companies such as Toshiba is organized in formal issue on December 9th, 2002; HDMI is based on DVI; adopt the TMDS encoding mechanism; to vision signal; audio signal and control signal are carried out time-division control; the maximum data transmission speed is 5Gbps, and it is poor for panel TV and wide colour gamut terminal transparency to have overcome DVI; the image copyright protection is lacked support; do not support digital audio and video signals; shortcomings such as the interface volume is big.DisplayPort is called for short the DP interface, is issued in May, 2006 by VESA (video electronics standard tissue).It is a kind of at all display devices open standard of (comprising inside and outside interface); adopt 8B/10B coding, embedded clock signal and little package framework; video content transmits in the package mode; support HDCP digital content protection agreement; simultaneously transmission of audio and video; maximum transmission bandwidth is 10.8Gb/S; it can realize that by one the external channel of two-way communication directly carries out the transmission of low bandwidth data such as voice, video, and the DisplayPort HDMI that compares has bigger transmission bandwidth and stronger compatibility.
In addition, the vehicle-mounted ATSC digital television receiver of described shortening available machine time further comprises: described and video data, the relevant data of voice data are caption datas.Described caption data comprises content, viewing area and the demonstration time of captions, with in the predetermined demonstration time, with caption content and video content is overlapping is presented on the display.
Adopt the vehicle-mounted ATSC digital television receiver of shortening available machine time of the present invention, for originally starting up speed was slower, can not provide solution according to the embedded onboard ATSC digital television receiver that signal quality carries out intelligent management, on the one hand, using the part work of the alternative master controller of video decompression apparatus of start-up phase free time is decompression work, on the other hand, can determine whether to carry out the demultiplexing of digital television program in real time according to the signal quality that receives, decompress and broadcast, the nothing of having avoided the user to watch is listened to the digital television program of the difference of meaning, reasonable distribution system resource again, the starting up speed of raising system has satisfied the requirement of user to starting up speed.
Be understandable that though the present invention with the preferred embodiment disclosure as above, yet above-described embodiment is not in order to limit the present invention.For any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (6)
1. vehicle-mounted ATSC digital television receiver that shortens the available machine time is characterized in that described digital television receiver comprises:
The ATSC signal detection module, demultiplexing module, the video decompression module, dynamic random access memory, flash memories and master controller, described master controller connects the ATSC signal detection module, demultiplexing module, the video decompression module, dynamic random access memory, flash memories, control the work of described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module, and when described digital television receiver starts, control described video decompression module and be written into the gunzip code, make described video decompression module have the calculation function of decompression, and the packed data in the flash memories transferred in the dynamic random access memory decompress for the video decompression module.
2. the vehicle-mounted ATSC digital television receiver of shortening available machine time as claimed in claim 1 is characterized in that, also comprises:
The ATSC tuner becomes intermediate frequency, filtering, amplification, analog-to-digital conversion operation to the ATSC digital TV broadcast signal that receives;
Described ATSC signal detection module is determined according to the ATSC digital TV broadcast signal that receives and is exported corresponding ATSC broadcast signal strength;
Demodulator, connect described ATSC tuner, the signal of described ATSC tuner output carried out carrier lock decode with detections synchronously, NTSC interference filter, channel equalization, Phase Tracking, trellis, deinterleaved, RS decodes and data are gone at random, output transport stream TS flows;
Described demultiplexing module connects described demodulator and carries out demultiplexing with the TS stream with described demodulator output, outputting audio data TS stream, video data TS stream, additional data TS stream, voice data TS stream, video data TS stream, additional data TS stream have different Packet Identifier PID, and described PID is the be responsible for assigning identifier of different value of different types of data in the TS stream;
The audio decompression module connects described demultiplexing module to receive described voice data TS stream, and described voice data TS stream is decompressed, and the voice data after decompressing with acquisition is play corresponding audio content for loud speaker;
Described video decompression module connects described demultiplexing module to receive described video data TS stream, and described video data TS stream is decompressed, and the video data after decompressing with acquisition shows corresponding video content for display;
The additional data decoder module, connect described demultiplexing module to receive described additional data TS stream, described additional data TS stream is decoded, to obtain decoded additional data, described additional data comprises the data of independently data service, also comprises the data relevant with described audio content, described video content;
Described dynamic random access memory is used for data are carried out dynamic randon access;
Described flash memories is used for graphic file or the program code data after the required compression of the described digital television receiver operation of storage;
Outer input interface receives the user by the control information of remote control or button input;
Described master controller connects the ATSC signal detection module, demultiplexing module, the audio decompression module, the video decompression module, the additional data decoder module, dynamic random access memory, flash memories and outer input interface, control information according to the outer input interface reception, control audio decompression module, the operation of video decompression module and additional data decoder module, and control the work of described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module, master controller is also when described digital television receiver starts, control described video decompression module and be written into the gunzip code, make described video decompression module have the calculation function of decompression, described master controller is transferred to a part of data in the described flash memories in the described dynamic random access memory, decompress for described video decompression module, deposit data after the decompression is in described dynamic random access memory, do not read when described video decompression module before the end character code of packed data of described flash memories, the notice master controller continues from described flash memories transferring data in described dynamic random access memory, continue to decompress for described video decompression module, read the end character code of the packed data of described flash memories up to described video decompression module, described video decompression module begins the decompression of described video data TS stream;
Wherein, the work that described master controller is controlled described demodulation multiplexer according to the ATSC broadcast signal strength that receives from described ATSC signal detection module comprises, when described ATSC broadcast signal strength is less than or equal to 60dBuV, stop the de-multiplex operation of described demodulation multiplexer, when described ATSC broadcast signal strength returns to greater than 60dBuV, recover the de-multiplex operation of described demodulation multiplexer;
Wherein, described TS stream is made up of packet header and load, described packet header comprises a sync byte SYNC1 and three other bytes, described three other bytes are used for traffic identification, scrambling and control information, described load comprises the MPEG-2 data of 184 bytes, specifically being distributed as of three other bytes in described TS stream packet header, 1 transmission error code indication bit position, 1 net amount is according to initial indication bit position, unit, 1 is transmitted the priority bit position, 13 bag identifier PID bits, 2 are transmitted scrambling control bit position, control bit position, 2 self adaptation districts and 4 continuous counter bits.
3. the vehicle-mounted ATSC digital television receiver of shortening as claimed in claim 2 available machine time is characterized in that:
Described loud speaker is the left and right acoustic channels loud speaker, and described display is LCD, and the resolution of described LCD is a kind of in 160 * 128,384 * 320,640 * 480 or 1024 * 600.
4. the vehicle-mounted ATSC digital television receiver of shortening as claimed in claim 2 available machine time is characterized in that:
Described vehicle-mounted ATSC digital television receiver is vehicle-mounted ATSC set-top box.
5. the vehicle-mounted ATSC digital television receiver of shortening available machine time as claimed in claim 2 is characterized in that, also comprises:
The audio-video signal connection interface module adopts fpga chip to realize being connected of audio-video signal of compatible DVI, HDMI and DisplayPort form, and described fpga chip is the EP2C5Q208C8N of ALTERA company.
6. the vehicle-mounted ATSC digital television receiver of shortening as claimed in claim 2 available machine time is characterized in that:
Described and video data, the relevant data of voice data are caption datas.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410888A (en) * | 2014-12-11 | 2015-03-11 | 成都新光微波工程有限责任公司 | Vehicle-mounted digital television receiver |
| CN114840261A (en) * | 2022-04-29 | 2022-08-02 | 中国第一汽车股份有限公司 | Boot animation playing method and device, vehicle and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146191A (en) * | 2007-10-15 | 2008-03-19 | 晨星半导体股份有限公司 | Data processing method applied into built-in system |
| CN101277159A (en) * | 2008-05-09 | 2008-10-01 | 中兴通讯股份有限公司 | Play method and apparatus for multimedia terminal |
| CN101442586A (en) * | 2008-12-31 | 2009-05-27 | 中兴通讯股份有限公司 | Method and terminal for playing multimedia |
| CN101489026A (en) * | 2009-01-07 | 2009-07-22 | 深圳市同洲电子股份有限公司 | Set-top box starting control method, image display method and set-top box |
| CN101834635A (en) * | 2010-04-23 | 2010-09-15 | 杭州海兴电器有限公司 | Relay optimizing method of low-voltage carrier networking |
-
2013
- 2013-05-13 CN CN2013101755748A patent/CN103237244A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146191A (en) * | 2007-10-15 | 2008-03-19 | 晨星半导体股份有限公司 | Data processing method applied into built-in system |
| CN101277159A (en) * | 2008-05-09 | 2008-10-01 | 中兴通讯股份有限公司 | Play method and apparatus for multimedia terminal |
| CN101442586A (en) * | 2008-12-31 | 2009-05-27 | 中兴通讯股份有限公司 | Method and terminal for playing multimedia |
| CN101489026A (en) * | 2009-01-07 | 2009-07-22 | 深圳市同洲电子股份有限公司 | Set-top box starting control method, image display method and set-top box |
| CN101834635A (en) * | 2010-04-23 | 2010-09-15 | 杭州海兴电器有限公司 | Relay optimizing method of low-voltage carrier networking |
Non-Patent Citations (1)
| Title |
|---|
| 赵毅强: "一种基于DMB-TH的车载数字电视接收机的硬件实现", 《中国优秀硕士学位论文全文数据库（信息科技辑）》, no. 12, 15 December 2010 (2010-12-15) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410888A (en) * | 2014-12-11 | 2015-03-11 | 成都新光微波工程有限责任公司 | Vehicle-mounted digital television receiver |
| CN114840261A (en) * | 2022-04-29 | 2022-08-02 | 中国第一汽车股份有限公司 | Boot animation playing method and device, vehicle and storage medium |
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