CN101022329A - Signal transmitting method and system used for digital multimedia broadcasting - Google Patents
Signal transmitting method and system used for digital multimedia broadcasting Download PDFInfo
- Publication number
- CN101022329A CN101022329A CN 200610007658 CN200610007658A CN101022329A CN 101022329 A CN101022329 A CN 101022329A CN 200610007658 CN200610007658 CN 200610007658 CN 200610007658 A CN200610007658 A CN 200610007658A CN 101022329 A CN101022329 A CN 101022329A
- Authority
- CN
- China
- Prior art keywords
- program
- superframe
- data
- framing
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
A signal transmission system used on digital multimedia broadcast comprises source adaptive buffer storage for buffer-storing data sent from source and for sending data to channel modulator, channel modulator for carrying out coding-modulation on received data and for sending coding-modulated data out, channel demodulator for carrying out decoding-modulation on received data and information sink buffer storage for buffer-storing received data.
Description
Technical field
The present invention relates to wireless communication technology field, more specifically, relate to a kind of method for transmitting signals and system that is used for DMB.
Background technology
Entered since 21st century, wireless communication technology just advances with unprecedented speed.Along with the user to the increase of various real-time multimedia business demands and the fast development of Internet technology, following wireless communication technology will have the higher rate of information throughput, think that the user provides bigger facility.In order to support the higher rate of information throughput and the user moving speed of Geng Gao, in follow-on radio communication, need to adopt the Radio Transmission Technology that spectrum efficiency is higher, the anti-multipath interference performance is stronger.In the current various wireless solutions that high rate data transmission is provided, be that the multi-carrier modulation technology of representative is one of the most promising scheme with OFDM (OFDM).
On the other hand, through years of development, the research of digital TV Broadcasting Techniques and application have obtained a large amount of achievements.Satellite digital TV is (such as DVB-S, the DVB-S2 in Europe, the S-DMB of Korea S and Japan), cable digital TV (such as the DVB-C in Europe), terrestrial DTV (such as DVB-T, the ATSC of the U.S., the IDSB-T of Japan in Europe), mobile digital TV (such as the DVB-H in Europe, the FLO of QualCom company) etc., obtain to use widely, obtained plentiful and substantial society and economic benefit in many countries and regions.
An important branch of digital television techniques development is the mobile video broadcast technology that Digital Television and mobile communication combine.This technology combines the characteristics of Digital Television and mobile communication, people's needs of received television signal have whenever and wherever possible been satisfied, have huge development potentiality, being considered to become next important mobile communication business, is subjected to each side and more and more payes attention to.For example, the DVB-H standard has been developed in Europe on existing DVB-T standard base, and the Qualcomm of the U.S. then releases the FLO technology.
In the DVB-H standard, use Cyclic Prefix to carry out synchronously and frequency offset estimating.Receiving terminal carries out the fast Fourier transform (FFT) computing need realize system synchronization, and synchronous foundation depends on the pilot frequency information that obtains after the FFT conversion, and this just makes FFT computing and interdepending synchronously.Therefore, need to adopt the iterative approach algorithm in the DVB-H standard, this just causes the problem of convergence error and time loss, so adopt the DVB-H technology can cause lock in time longer.And when sending signal in the BURST mode, the DVB-H technology is particularly evident than long shortcoming lock in time.
In addition, DVB-H has continued to use the physical layer frame structure among the DVB-T, and the time slicing of different programs (time-slice) does not have direct mapping relations on physical layer frame and superframe.And the program searching of DVB-H determines by PSI/SI information, when carrying out channel search and switching, needs all programs of traversal determine the position of expectation program receiving, so it is longer to change the platform time.Simultaneously, switch if frequently carry out channel, the power consumption of terminal also can be bigger.
Summary of the invention
In view of this, main purpose of the present invention is to propose a kind of method for transmitting signals that is used for DMB, to shorten lock in time.
Another object of the present invention is to propose a kind of signal transmission system that is used for DMB, to shorten lock in time.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of signal transmission system that is used for DMB, this system comprises:
Message-source adapted buffer is used for the data that buffer memory is sent by information source, and each program is sent to channel modulator in the data of a required transmission of superframe;
Channel modulator, be used for the data that receive are carried out coded modulation, data map after the coded modulation is sent behind program framing and program frame again, wherein in superframe, insert the superframe prefix, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
Channel demodulator is used for the data that the receive demodulation of decoding is realized superframe-synchronized according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer;
Stay of two nights buffer is used for the data that buffer memory receives.
Described channel modulator is further used for inserting the program set frame prefix in the program framing, channel demodulator is further used for realizing program set frame synchronization according to the program set frame prefix.
Described channel modulator is further used for inserting the superframe control information that superframe is controlled in superframe.
Described superframe control information comprise in the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing is comprised, each program framing any one or wherein be no less than a kind of combination in any.
Described channel modulator is further used for inserting the program set frame control information that the program framing is controlled in the program framing.
Described program set frame control information comprise in the coded modulation information of position length, each program frame of each program frame any one or wherein be no less than a kind of combination in any.
Described program set frame control information comprises the control sign that is used to indicate whether to receive at next superframe the superframe control information.
In the described program framing, each height stream that belongs to a program by time-division, frequency division, the time any one compound mode in the frequency division form the program frame.
The data of described program frame are a transport stream.
The data of described program frame are video sub-streams, audio sub-stream, the basic straton stream in H.264 or strengthen in the straton stream any one or wherein be no less than a kind of combination in any.
This system further comprises player, is used for playing by stay of two nights buffer data in buffer, and player is connected with stay of two nights buffer.
A kind of method for transmitting signals that is used for DMB may further comprise the steps:
The data that A, message-source adapted buffer buffer memory are sent by information source, and each program sent to channel modulator in the data of a required transmission of superframe;
B, channel modulator carry out coded modulation to the data that receive, data map after the coded modulation is sent behind program framing and program frame again, wherein insert the superframe prefix in superframe, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
C, channel demodulator realize superframe-synchronized to the data that the receive demodulation of decoding according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer, the data that stay of two nights buffer buffer memory receives.
Channel modulator further inserts the program set frame prefix among the step B in the program framing, and channel demodulator is further realized program set frame synchronization according to the program set frame prefix among the step C.
Channel modulator further inserts the superframe control information that superframe is controlled among the step B in superframe.
Described superframe control information comprise in the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing is comprised, each program framing any one or wherein be no less than a kind of combination in any.
Channel modulator further inserts the program set frame control information that the program framing is controlled among the step B in the program framing.
Described program set frame control information comprise in the coded modulation information of position length, each program framing of each program frame any one or wherein be no less than a kind of combination in any.
Described program set frame control information comprises the control sign that is used to indicate whether to receive at next superframe the superframe control information.
In the described program framing, each height stream that belongs to a program by time-division, frequency division, the time any one compound mode in the frequency division form the program frame.
The data of described program frame are a transport stream.
The data of described program frame are video sub-streams, audio sub-stream, the basic straton stream in H.264 or strengthen in the straton stream any one or wherein be no less than a kind of combination in any.
This method further comprises: play by stay of two nights buffer data in buffer behind step C.
The data that the described stay of two nights buffer of step C buffer memory receives comprise:
The initial moment at the program framing at the program place that needs receive is opened the data that analog circuit receives required program frame;
After receiving the described program frame data that needs to receive, enter data into stay of two nights buffer buffer memory, and close described analog circuit.
As can be seen from the above technical solutions, in the present invention, channel modulator inserts superframe prefix and program set frame prefix in superframe, channel demodulator is to the data that the receive demodulation of decoding, and according to superframe prefix realization superframe-synchronized, realize program set frame synchronization according to the program set frame prefix, so the present invention can improve system synchronization ability and frequency offset correction ability significantly, thereby greatly shorten lock in time.
Simultaneously, the present invention can obtain the program frame position by using the superframe control information in the superframe original position, switches thereby be convenient to program; By the indication that changes about next superframe information in the program set information, can make receiving terminal only just receive the superframe control information when needed; By the program number that comprises in fixedly program frame length and the program framing, the variation frequency of superframe control information is dropped to minimum, thereby be beneficial to terminal power saving; Simultaneously, by the division of superframe, program framing, program frame, that data encapsulation, the packing processing complexity of transmitting terminal is lower.In addition, the present invention has message-source adapted buffer at transmitting terminal, is used for the data that buffer memory is sent by information source, and each program is sent to channel modulator in the data of a required transmission of superframe; At receiving terminal stay of two nights buffer is arranged, be used for the data that buffer memory receives, therefore be beneficial to very much the terminal power saving and be convenient to program and switch.
Description of drawings
Fig. 1 is according to the physical layer frame structure exemplary schematic representation that is used for DMB of the present invention.
Fig. 2 is the time division multiplexing compound mode exemplary schematic representation according to each program in the program frame of the present invention.
Fig. 3 is the frequency division multiplexing compound mode exemplary schematic representation according to each height stream in the program frame of the present invention.
Fig. 4 is the time-frequency multiplexed combinations mode exemplary schematic representation according to each height stream in the program frame of the present invention.
Fig. 5 is the structural representation according to the signal transmission system that is used for DMB of the embodiment of the invention.
Fig. 6 is the method for transmitting signals schematic flow sheet according to exemplary numbers multimedia broadcasting of the present invention.
Fig. 7 is the schematic flow sheet according to demonstration network side signal transmitting method of the present invention.
Fig. 8 is the schematic flow sheet according to exemplary terminal side signal acceptance method of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
In transmission of wireless signals, the physical frame structures shape of signal the basic framework of physical layer, be the basis of transmission of wireless signals.For the ease of the reliable reception of receiver, the data-signal that transmits need be formed physical frame according to certain form usually.According to different application scenarios, the structure of physical frame can be different with forming.In mobile video broadcast system, the frame structure of physical layer all has a direct impact receiver net synchronization capability, fast channel switching, terminal power saving.
Fig. 1 is according to the physical layer frame structure exemplary schematic representation that is used for DMB of the present invention.As shown in Figure 1, in the present invention, the physical layer frame of signal is divided into three levels: superframe, program framing, program frame.Wherein, the base unit of signal transmission is a superframe.Each superframe is made up of superframe prefix, superframe control information and at least one program framing; Each program framing is made up of program set frame prefix, program set frame control information and at least one program frame; Each program frame is made up of at least one OFDM symbol, and each OFDM symbol is made up of at interval OFDM data and protection, and wherein protection can adopt zero, Cyclic Prefix or PN sign indicating number to fill at interval.
The superframe prefix is used for superframe-synchronized and channel estimating; The superframe control information can comprise the position length of system's frequency, neighbor cell list, program framing, the global informations such as program that the program framing comprises, also can be specific to the information such as position, coding and modulation system of each program frame in each program framing; A superframe prefix is made of an OFDM symbol at least; The program set frame prefix is used for program set frame synchronization and channel estimating, and the program set frame control information comprises: the coded modulation information of the position length of each program frame, each program frame.Because superframe information may not be frequent change, in order to save the terminal electrical source consumption, can indicate whether in the program set information to receive the superframe control information at next superframe, a program set frame prefix is made of an OFDM symbol at least.
The data of a program can be transport stream, also can further be divided into experimental process stream, the basic straton stream as video sub-streams, audio sub-stream, in H.264, strengthen straton stream etc.
Each height stream in program frame can adopt time-division, frequency division, the time frequency division mode be combined into a program frame, compound mode indicates at the program set frame control information and gets final product.
Fig. 2 is the time division multiplexing compound mode schematic diagram according to each program in the program frame of the present invention, wherein shows the time division multiplexing compound mode of each program in i the program frame.As shown in Figure 2, each height stream of each program can make up according to the mode of time-division in a program frame, the data map of each son stream is to several OFDM symbols, and the number of the signal frame of the data occupancy of each program depends on the speed of program, code rate, planisphere mapping mode etc.
Fig. 3 is the frequency division multiplexing compound mode schematic diagram according to each height stream in the program frame of the present invention, wherein shows the frequency division multiplexing compound mode of each program in i the program frame.As shown in Figure 3, each height stream can make up according to the mode of frequency division in a program frame.The data map of each son stream is to the subchannel of being made up of the experimental process carrier wave, and the subcarrier number of the data occupancy of each son stream depends on the speed of program, code rate, planisphere mapping mode etc.
Fig. 4 is the time-frequency multiplexed combinations mode schematic diagram according to each height stream in the program frame of the present invention.As shown in Figure 4, each height stream can make up according to the multiplexing mode of time-frequency in a program frame.The data map of a son stream wherein takies c respectively on the 1st and M signal frame to M OFDM symbol
1, c
MIndividual data subcarrier (c wherein
1, c
MValue can be from 1 to whole data subcarrier), all data subcarriers all are used for transmitting the data of this son stream on the middle M-2 symbol.The speed that subcarrier number that each son stream certificate takies and OFDM symbol numbers M depend on each, code rate, planisphere mapping mode etc.
Fig. 5 is the structural representation according to the signal transmission system that is used for DMB of the embodiment of the invention.As shown in Figure 5, this system comprises:
Message-source adapted buffer 501 is used for the data that buffer memory is sent by information source, and each program is sent to channel modulator in the data of a required transmission of superframe;
Channel modulator 502, be used for the data that receive are carried out coded modulation, data map after the coded modulation is sent behind program framing and program frame again, wherein in superframe, insert the superframe prefix, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
Channel demodulator 503 is used for the data that the receive demodulation of decoding is realized superframe-synchronized according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer;
Stay of two nights buffer 504 is used for the data that buffer memory receives;
Wherein message-source adapted buffer 501 is connected with channel modulator 502, and channel modulator 502 is connected with channel demodulator 503 by wireless channel, and channel demodulator 503 is connected with stay of two nights buffer 504.
Message-source adapted buffer 501 is positioned at transmitter section, the data flow of information source output at first is sent to message-source adapted buffer 501, the data that the content of message-source adapted buffer 501 buffer memorys need send at next superframe for each program, the time that these data can be play is at least a superframe.
Channel modulator 502 can comprise scrambling, encodes outward, interweaves outward, interior coding, in interweave, planisphere mapping, subchannel mapping, pilot tone/signaling generate, the IFFT modulation, insert several modules such as protection interval, framing, D/A, middle radio frequency processing.
In the initial moment of each superframe, message-source adapted buffer 501 is delivered to channel modulator 502 with each program later in the packing data of the required transmission of current superframe, channel modulator 502 sends to channel demodulator 503 with the data map after the coded modulation behind program framing and program frame, wherein insert the superframe prefix in superframe.
Here, preferably, channel modulator 502 passes through the later data map of coded modulation according to the frame structure among Fig. 1 on corresponding program framing and program frame with each program, and sends by channel.That is to say, preferably both in superframe, inserted the superframe prefix, in the program framing, insert the program set frame prefix again.Simultaneously, also in superframe, insert the superframe control information that superframe is controlled, in the program framing, insert the program set frame control information that the program framing is controlled.Preferably, the superframe control information comprises the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing comprised, each program framing etc.The program set frame control information comprises the position length of each program frame, the coded modulation information of each program framing etc.; The program set frame control information preferably includes the control sign that is used to indicate whether to receive at next superframe the superframe control information.
Channel demodulator 503 can comprise middle radio frequency part, A/D, synchronously, channel estimation balancing, FFT demodulation, subchannel separate mapping, constellation diagram mapping, interweave, separate interior coding in separating, separate the outer modules such as coding, descrambling outward that interweave, separate.The demodulation of decoding of 503 pairs of data that receive of channel demodulator realizes superframe-synchronized and program set frame synchronization according to superframe prefix and program set frame prefix, be specially and realize time synchronized and frequency offset correction, and the data after will be synchronously sends to stay of two nights buffer.
Stay of two nights buffer 504 is arranged in receiving terminal, is used for the data that buffer memory receives.In addition, stay of two nights buffer 504 can also connect player, the data that receive with broadcast.
Particularly, at receiving terminal, in the initial moment of the program place of required reception program framing, receiving terminal is opened analog circuit to receive data.After receiving needed program data, close receiving circuit at once, metadata cache is arrived stay of two nights buffer 504, thereby be beneficial to the terminal power saving.Then, stay of two nights buffer 504 outputs in the player by the broadcasting speed of this program and plays.
Fig. 6 is the method for transmitting signals schematic flow sheet according to exemplary numbers multimedia broadcasting of the present invention.As shown in Figure 6, this method comprises:
Step 601: the data that the message-source adapted buffer buffer memory is sent by information source, and each program sent to channel modulator in the data of a required transmission of superframe;
Here, in the initial moment of each superframe, message-source adapted buffer is delivered to channel modulator with each program later in the packing data of the required transmission of current superframe.
Step 602: channel modulator carries out coded modulation to the data that receive, data map after the coded modulation is sent to channel demodulator behind program framing and program frame, wherein in superframe, insert the superframe prefix, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
Here, channel modulator can further insert the program set frame prefix in the program framing, thereby channel demodulator can further be realized program set frame synchronization according to the program set frame prefix among the step C.Channel modulator can also further insert the superframe control information, and the superframe control information comprises the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing comprised, each program framing etc.Channel modulator can also further insert the program set frame control information that the program framing is controlled among the step B in the program framing.The program set frame control information comprises the position length of each program frame, the coded modulation information of each program frame etc.
Step 603: channel demodulator is realized superframe-synchronized to the data that the receive demodulation of decoding according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer, the data that stay of two nights buffer buffer memory receives.
Here, channel demodulator is positioned at receiving terminal, and receiving terminal is opened analog circuit in the initial moment of the program framing at the program place of required reception and received data, and behind the program data of receiving required reception, close analog circuit, thereby be convenient to the terminal power saving.
Such as, the time of supposing a superframe is 2s, the time of a program frame is 0.125s, receiving terminal of bottom line only need be opened the analog circuit of 125ms in the time of 2s, all the other times are closed analog circuit to save energy consumption, and receiving mode can be saved energy consumption more than 90% relatively continuously.
According to flow process shown in Figure 6, respectively demonstration network side signal transmitting method according to the present invention and end side signal acceptance method are carried out exemplary detailed description below.
Fig. 7 is the schematic flow sheet according to demonstration network example signal transmitting method of the present invention.
As shown in Figure 7, this method may further comprise the steps:
Step 701: message-source adapted buffer is carried out buffer memory to the data of each program that information source sends;
Step 702: message-source adapted buffer was packed the data that a last program of each superframe time need transmit in the initial moment of each superframe according to certain form encapsulation:
Step 703: data sent to channel modulator after message-source adapted buffer will be packed;
Step 704: channel modulator carries out coded modulation to the data that receive, and inserts superframe prefix, superframe control information, program set frame prefix and program set frame control information in the relevant position according to frame structure shown in Figure 1;
Step 705: channel modulator sends the data of a superframe on eating dishes without rice or wine.
Fig. 8 is the schematic flow sheet according to exemplary terminal side signal acceptance method of the present invention.As shown in Figure 8, this method may further comprise the steps:
Step 801: terminal some time before the initial moment of each superframe is opened analog circuit, 100 ms of tens ms to preferably herein, utilize the known channel information capture superframe head in the superframe prefix, thus realize to send and the time synchronized of receiving terminal and and Frequency Synchronization;
Step 802: realize that after the superframe-synchronized, channel demodulator is resolved the superframe control information, obtains the position and the system information of the program framing of required reception;
Step 803: obtain after the positional information of program framing, channel demodulator cuts out analog circuit;
Step 804: the some moment before the program framing of required reception arrives are opened analog circuit, generally be that several ms are to tens ms herein, utilize the Given information in the program set prefix to catch the program set frame head, thereby realize the time synchronized and the Frequency Synchronization of transmission and receiving terminal;
Step 805: channel demodulator is resolved the program set control information, obtains the positional information of required program receiving and the relevant information of each height stream thereof;
Step 806: channel demodulator carries out corresponding demodulating and decoding to required program data to be handled;
Step 807: the data of channel demodulator after with demodulation are submitted to stay of two nights buffer;
Step 808: channel demodulator cuts out analog circuit after receiving the data of required programs;
Step 809: the data that stay of two nights buffer buffer memory receives;
Step 810: stay of two nights buffer is submitted to the upper strata with data in buffer with normal playback rate.
According to top detailed description, a concrete embodiment of invention is described below:
The sample frequency that can set the digital multimedia signal transmission system is 7.56MHz, and the sampling number of OFDM data is 3780 points, and protection length at interval is 420 points.A superframe is made up of 3600 OFDM symbols, and the duration is 2 seconds, and superframe comprises a superframe prefix, a superframe control information, 8 program framings.A superframe prefix takies 1 OFDM symbol, and a superframe control information takies 7 OFDM symbols.
Wherein, the duration of a program framing and the number of programs that comprises can determine that receiving terminal is given in indication in superframe information according to the situation of reality operation.A program set frame prefix takies 1 OFDM symbol, and a program set frame control information takies 1 OFDM symbol.
The duration of a program and the OFDM symbolic number that comprises can determine that receiving terminal is given in indication in the program set frame control information, and also can select in the superframe control information to transmit according to the situation of reality operation.
The duration of a program framing and the program that comprises can remain unchanged always, and the variation frequency of superframe information will be very low like this, makes receiver to receive only program data at ordinary times, has only just to receive superframe information when superframe information changes.Thereby reduce the receiver power consumption significantly.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (23)
1, a kind of signal transmission system that is used for DMB is characterized in that, this system comprises:
Message-source adapted buffer is used for the data that buffer memory is sent by information source, and each program is sent to channel modulator in the data of a required transmission of superframe;
Channel modulator, be used for the data that receive are carried out coded modulation, data map after the coded modulation is sent behind program framing and program frame again, wherein in superframe, insert the superframe prefix, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
Channel demodulator is used for the data that the receive demodulation of decoding is realized superframe-synchronized according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer;
Stay of two nights buffer is used for the data that buffer memory receives.
2, system according to claim 1 is characterized in that, described channel modulator is further used for inserting the program set frame prefix in the program framing, and channel demodulator is further used for realizing program set frame synchronization according to the program set frame prefix.
3, system according to claim 1 is characterized in that, described channel modulator is further used for inserting the superframe control information that superframe is controlled in superframe.
4, system according to claim 3, it is characterized in that, described superframe control information comprise in the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing is comprised, each program framing any one or wherein be no less than a kind of combination in any.
According to claim 1 or 3 described systems, it is characterized in that 5, described channel modulator is further used for inserting the program set frame control information that the program framing is controlled in the program framing.
6, system according to claim 5 is characterized in that, described program set frame control information comprise in the coded modulation information of position length, each program framing of each program frame any one or wherein be no less than a kind of combination in any.
7, system according to claim 6 is characterized in that, described program set frame control information comprises the control sign that is used to indicate whether to receive at next superframe the superframe control information.
8, system according to claim 1 is characterized in that, in the described program framing, each height stream that belongs to a program by time-division, frequency division, the time any one compound mode in the frequency division form the program frame.
9, system according to claim 1 is characterized in that, the data of described program frame are a transport stream.
10, system according to claim 1 is characterized in that, the data of described program frame are video sub-streams, audio sub-stream, the basic straton stream in H.264 or strengthen in the straton stream any one or wherein be no less than a kind of combination in any.
11, system according to claim 1 is characterized in that, this system further comprises player, is used for playing by stay of two nights buffer data in buffer, and player is connected with stay of two nights buffer.
12, a kind of method for transmitting signals that is used for DMB is characterized in that, may further comprise the steps:
The data that A, message-source adapted buffer buffer memory are sent by information source, and each program sent to channel modulator in the data of a required transmission of superframe;
B, channel modulator carry out coded modulation to the data that receive, data map after the coded modulation is sent behind program framing and program frame again, wherein insert the superframe prefix in superframe, described superframe comprises at least one program framing, and each program framing comprises a program frame at least;
C, channel demodulator realize superframe-synchronized to the data that the receive demodulation of decoding according to the superframe prefix, and the data after will be synchronously send to stay of two nights buffer, the data that stay of two nights buffer buffer memory receives.
13, method according to claim 12 is characterized in that, channel modulator further inserts the program set frame prefix among the step B in the program framing, and channel demodulator is further realized program set frame synchronization according to the program set frame prefix among the step C.
14, method according to claim 12 is characterized in that, channel modulator further inserts the superframe control information that superframe is controlled among the step B in superframe.
15, method according to claim 14, it is characterized in that, described superframe control information comprise in the position, coded system, modulation system of each program frame in the position length of system's frequency, neighbor cell list, program framing, program that the program framing is comprised, each program framing any one or wherein be no less than a kind of combination in any.
According to claim 12 or 14 described methods, it is characterized in that 16, channel modulator further inserts the program set frame control information that the program framing is controlled among the step B in the program framing.
17, method according to claim 16 is characterized in that, described program set frame control information comprise in the coded modulation information of position length, each program frame of each program frame any one or wherein be no less than a kind of combination in any.
18, method according to claim 16 is characterized in that, described program set frame control information comprises the control sign that is used to indicate whether to receive at next superframe the superframe control information.
19, method according to claim 12 is characterized in that, in the described program framing, each height stream that belongs to a program by time-division, frequency division, the time any one compound mode in the frequency division form the program frame.
20, method according to claim 12 is characterized in that, the data of described program frame are a transport stream.
21, method according to claim 12 is characterized in that, the data of described program frame are video sub-streams, audio sub-stream, the basic straton stream in H.264 or strengthen in the straton stream any one or wherein be no less than a kind of combination in any.
22, method according to claim 12 is characterized in that, this method further comprises: play by stay of two nights buffer data in buffer behind step C.
23, method according to claim 12 is characterized in that, the data that the described stay of two nights buffer of step C buffer memory receives comprise:
The initial moment at the program framing at the program place that needs receive is opened the data that analog circuit receives required program frame;
After receiving the described program frame data that needs to receive, enter data into stay of two nights buffer buffer memory, and close described analog circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007658 CN101022329A (en) | 2006-02-15 | 2006-02-15 | Signal transmitting method and system used for digital multimedia broadcasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007658 CN101022329A (en) | 2006-02-15 | 2006-02-15 | Signal transmitting method and system used for digital multimedia broadcasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101022329A true CN101022329A (en) | 2007-08-22 |
Family
ID=38709993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610007658 Pending CN101022329A (en) | 2006-02-15 | 2006-02-15 | Signal transmitting method and system used for digital multimedia broadcasting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101022329A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953133A (en) * | 2008-02-21 | 2011-01-19 | 三星电子株式会社 | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| CN102685469A (en) * | 2012-05-04 | 2012-09-19 | 北京航空航天大学 | Audio-video transmission code stream framing method based on moving picture experts group-2 (MPEG-2) advanced audio coding (AAC) and H.264 |
| CN103532897A (en) * | 2013-04-07 | 2014-01-22 | 上海数字电视国家工程研究中心有限公司 | OFDM modulation and demodulation method and corresponding sender and receiver |
| CN103731240A (en) * | 2007-08-30 | 2014-04-16 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| US9060251B2 (en) | 2008-02-21 | 2015-06-16 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| CN106302285A (en) * | 2015-05-27 | 2017-01-04 | 中国科学院上海高等研究院 | A kind of physical frame communication means of wireless digital multimedia broadcast system |
| CN107634961A (en) * | 2011-01-19 | 2018-01-26 | 三星电子株式会社 | For configuring the device and method of control message in broadcast system |
| CN112583678A (en) * | 2019-09-30 | 2021-03-30 | 英飞凌科技股份有限公司 | Receiver apparatus, sender apparatus, and method for clock synchronization |
| CN115883024A (en) * | 2023-02-27 | 2023-03-31 | 成都星联芯通科技有限公司 | Data mapping method and device, high-orbit equipment and computer storage medium |
-
2006
- 2006-02-15 CN CN 200610007658 patent/CN101022329A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731240A (en) * | 2007-08-30 | 2014-04-16 | Lg电子株式会社 | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal |
| US9602978B2 (en) | 2008-02-21 | 2017-03-21 | Samsung Electronics Co., Ltd | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| CN101953133A (en) * | 2008-02-21 | 2011-01-19 | 三星电子株式会社 | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| US9602979B2 (en) | 2008-02-21 | 2017-03-21 | Samsung Electronics Co., Ltd | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| US9060251B2 (en) | 2008-02-21 | 2015-06-16 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system |
| US11330312B2 (en) | 2011-01-19 | 2022-05-10 | Samsung Electronics Co., Ltd. | Apparatus and method for configuring a control message in a broadcast system |
| CN107634961A (en) * | 2011-01-19 | 2018-01-26 | 三星电子株式会社 | For configuring the device and method of control message in broadcast system |
| US11653042B2 (en) | 2011-01-19 | 2023-05-16 | Samsung Electronics Co., Ltd. | Apparatus and method for configuring a control message in a broadcast system |
| CN102685469A (en) * | 2012-05-04 | 2012-09-19 | 北京航空航天大学 | Audio-video transmission code stream framing method based on moving picture experts group-2 (MPEG-2) advanced audio coding (AAC) and H.264 |
| CN103532897A (en) * | 2013-04-07 | 2014-01-22 | 上海数字电视国家工程研究中心有限公司 | OFDM modulation and demodulation method and corresponding sender and receiver |
| CN103532897B (en) * | 2013-04-07 | 2017-06-13 | 上海数字电视国家工程研究中心有限公司 | OFDM modulation-demo-demodulation methods and corresponding emitter, receiver |
| CN106302285A (en) * | 2015-05-27 | 2017-01-04 | 中国科学院上海高等研究院 | A kind of physical frame communication means of wireless digital multimedia broadcast system |
| CN106302285B (en) * | 2015-05-27 | 2019-06-04 | 中国科学院上海高等研究院 | A kind of physical frame communication means of wireless digital multimedia broadcast system |
| CN112583678A (en) * | 2019-09-30 | 2021-03-30 | 英飞凌科技股份有限公司 | Receiver apparatus, sender apparatus, and method for clock synchronization |
| CN112583678B (en) * | 2019-09-30 | 2022-07-22 | 英飞凌科技股份有限公司 | Receiver apparatus, sender apparatus, and method for clock synchronization |
| CN115883024A (en) * | 2023-02-27 | 2023-03-31 | 成都星联芯通科技有限公司 | Data mapping method and device, high-orbit equipment and computer storage medium |
| CN115883024B (en) * | 2023-02-27 | 2023-05-09 | 成都星联芯通科技有限公司 | Data mapping method, device, high-track equipment and computer storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101022329A (en) | Signal transmitting method and system used for digital multimedia broadcasting | |
| CN101682444A (en) | Apparatus and method for use in a mobile/handheld communications system | |
| EP1841106A2 (en) | DAB-compatible transmitting and receiving method and system for terrestrial mobile multimedia broadcasting | |
| CN101682445B (en) | System and method for scheduling and transferring data through a transmission system | |
| AU2011219954A1 (en) | Encoder and encoding method providing incremental redundancy | |
| KR20160018536A (en) | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals | |
| CN103780568A (en) | Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal | |
| CN101588489B (en) | Method and device for transmitting graded multiple services divided based on physical layer sub-channel | |
| JP2001136151A (en) | Method and device to identify orthogonal frequency division multiplex(ofdm) ground repeater using subcarrier not in use | |
| CN101465829A (en) | Method and apparatus for transmitting and receiving layered modulation data | |
| CN1604646B (en) | Method for reducing power consumption of hand-held mobile multimedia telecasting equipment | |
| CN101018085B (en) | A method and system for providing the digital multi-media broadcast signal | |
| CN101636944B (en) | For providing the method for low bit rate transmission in the dvb-h transmission | |
| CN101808067A (en) | Method and device thereof for receiving and transmitting OFDM signals by using differential data as pilot frequencies | |
| CN103546222A (en) | Method for transmitting and receiving emergency broadcast signal | |
| CN1531261A (en) | Digital interactive multimedia network system and data transmission method therewith | |
| CN201349326Y (en) | Audio storage system and mobile terminal | |
| US20100329228A1 (en) | Digital broadcast retransmission system, digital broadcast retransmission method, packet converting apparatus, and frequency converting apparatus | |
| CN101252682B (en) | Interactive digital television front end high unvoiced sound video interface system | |
| Saito et al. | A digital modulation method for terrestrial digital TV broadcasting using trellis coded OFDM and its performance | |
| CN101557509B (en) | Method for transmitting mobile multimedia compatible with terrestrial digital terrestrial television transmission standard | |
| CN101031075A (en) | System and method for mobile video broadcasting | |
| CN101399974B (en) | Front end high definition audio and video interface device for interactive digital television and access method | |
| CN101371473A (en) | Transmitter and receiver for digital broadcasting | |
| Faria et al. | DVB-H to deliver digital TV to handheld terminals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |