CN101159965B - Mobile multimedia broadcasting signal monitoring method - Google Patents
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Abstract
The invention discloses a monitoring method for mobile multimedia broadcasting signals, which comprises: a broadcasting signal receiving device implemented by a hardware physical entity receiving the mobile multimedia broadcasting signals, outputting after demodulation and channel decoding to a broadcasting signal processing device; a data acquisition device implemented by the hardware physical entity performing data acquisition for the mobile multimedia broadcasting signals, and outputting the acquired broadcasting signal data to the broadcasting signal processing device; the broadcasting signal processing device playing the audio/video play of the received broadcasting signals via a play software and receiving the broadcasting signal data output by the data acquisition device to calculate the parameters indicative of the multimedia broadcast channel reception quality and/or multimedia broadcasting signal reception quality. The invention can realize the rapid processing of mobile multimedia broadcasting signals and facilitate the implementation of monitoring function expansion.
Description
Technical field
The present invention relates to Mobile Multimedia Broadcasting, relate in particular to a kind of mobile multimedia broadcast signal monitoring method.
Background technology
Along with the continuous development and the maturation of China mobile multi-media broadcasting technology, people become increasingly conspicuous to the demand of mobile multi-media broadcasting service, and the coverage of the power of broadcast singal and signal all affects the service quality of Mobile Multimedia Broadcasting.So the monitoring that covers for broadcasting station signal becomes a very important techniques, therefore, mobile multimedia broadcast signal monitoring equipment (claiming road detector again) also just arises at the historic moment.The Mobile Multimedia Broadcasting road detector has error rate test, the field intensity record, and the error rate writes down and can generate functions such as field intensity and error rate distribution map in conjunction with electronic chart.
In the prior art, this class road detector has following two kinds of implementations:
Scheme one: adopt special integrated circuit (IC) chip (ASIC) to carry out the mobile multimedia broadcast signal monitoring.That is: the demodulation of mobile multimedia broadcast signal, decoding and other computing function of calculating the broadcast singal transmission quality all are integrated in the hardware chip realize.The advantage of this scheme is that Signal Processing speed is fast, but its shortcoming is the cost height of the special ASIC of exploitation, and the cycle is long.And the relatively difficulty that updates.
Scheme two: adopt the method for pure software to carry out the mobile multimedia broadcast signal monitoring.That is: demodulation, decoding and other computing function of calculating the broadcast singal transmission quality to mobile multimedia broadcast signal all adopts software to realize.The advantage of this scheme is that the construction cycle is short, function expansion, upgrading easily, but to be in harmonious proportion the decoding processing speed slow owing to adopt software to carry out separating of broadcast singal, is not suitable for the processing to transmission rate height, the multimedia broadcast signal that contains much information.
Summary of the invention
The embodiment of the invention provides a kind of conversion speed fast and convenient mobile multimedia broadcast signal monitoring equipment and the monitoring method that realizes the function expansion.
The mobile multimedia broadcast signal monitoring equipment that the embodiment of the invention provides comprises: broadcast receiver, data acquisition unit and broadcast signal process device;
Described broadcast receiver is the hardware physical entity, is used to receive mobile multimedia broadcast signal, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device;
Described data acquisition unit is the hardware physical entity, is used for mobile multimedia broadcast signal is carried out data acquisition, and will gathers the broadcast signal data that obtains and export to described broadcast signal process device;
Described broadcast signal process device is used to receive the broadcast signal data that described broadcast receiver is exported, and carries out audio frequency and video by playout software and plays; And the broadcast signal data that receives described data acquisition unit output, calculate the parameter value that characterizes the multimedia broadcast channels quality and/or the multimedia broadcast signal quality of reception.
Described broadcast receiver comprises: first reception antenna, first tuner and demodulation chip;
Described first reception antenna is used to receive mobile multimedia broadcast signal, and sends described first tuner to;
Described first tuner is used for mobile multimedia broadcast signal is down-converted to baseband signal, and sends described demodulation chip to;
Described demodulation chip is used for described baseband signal is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device.
Described first tuner comprises: radio frequency amplifier, low-converter, baseband amplifier and yield value register;
Described radio frequency amplifier is used for the mobile multimedia broadcast signal that described first reception antenna receives is carried out power amplification, and exports to low-converter;
Described low-converter is used for the mobile multimedia broadcast signal of described radio frequency amplifier output is down-converted to baseband signal, and exports to baseband amplifier;
Described baseband amplifier is used for the baseband signal of described low-converter output is carried out power amplification, and sends described demodulation chip to;
Described yield value register is used to store the yield value of described radio frequency amplifier and described baseband amplifier.
Described data acquisition unit comprises: A/D converter and code check matching unit;
Described A/D converter is used for the baseband signal of described first tuner output is sampled, and the broadcast signal data that will gather acquisition sends described code check matching unit to;
Described code check matching unit, the bit bit wide that is used for broadcast signal data that described A/D converter is transmitted be converted to and described broadcast signal process device between the bit bit wide transmitted, and send the broadcast signal data after the bit bit width conversion to described broadcast signal process device.
Perhaps, described data acquisition unit comprises second reception antenna, second tuner, A/D converter and code check matching unit;
Described second reception antenna is used to receive mobile multimedia broadcast signal, and sends described second tuner to;
Described second tuner is used for mobile multimedia broadcast signal is down-converted to baseband signal, and sends described A/D converter to;
Described A/D converter is used for the baseband signal of described second tuner output is sampled, and the broadcast signal data that will gather acquisition sends described code check matching unit to;
Described code check matching unit, the bit bit wide that is used for broadcast signal data that described A/D converter is transmitted be converted to and described broadcast signal process device between the bit bit wide transmitted, and send the broadcast signal data after the bit bit width conversion to described broadcast signal process device.
Described data acquisition unit also comprises at least one memory, is used for the broadcast signal data after the buffer memory bit bit width conversion.
Described code check matching unit adopts programmable gate array FPGA to realize.
Described broadcast signal process device is for embedding the computer that broadcast signal process functional software module is arranged; Described broadcast signal process functional software module comprises at least:
Play submodule, be used to receive the broadcast signal data of described broadcast receiver output, carry out demultiplexing and audio frequency and video compression coding, and carry out audio frequency and video by playout software and play;
First calculating sub module is used to receive the broadcast signal data that described data acquisition unit is exported, and calculates the time domain impulse response that characterizes the multimedia broadcast channels quality.
Described broadcast signal process functional software module also comprises: the pseudo random sequence sub module stored and second calculating sub module;
Described pseudo random sequence sub module stored is used to store the pseudo random sequence of making an appointment;
Described second calculating sub module, be used for obtaining the pseudo random sequence that the broadcast signal data of described broadcast receiver output comprises, and with described pseudo random sequence sub module stored in the pseudo random sequence of storing pursue bit relatively, add up and calculate the bit error rate that characterizes the multimedia broadcast signal quality of reception.
Described broadcast signal process functional software module also comprises: the 3rd calculating sub module;
Described the 3rd calculating sub module is used for obtaining current gain value from the yield value register of described first tuner, calculates the signal strength of current multimedia broadcast signal.
Described broadcast signal process functional software module also comprises: electronic chart sub module stored and locating and displaying submodule;
Described electronic chart sub module stored is used for storing electronic map;
Described locating and displaying submodule, be used for obtaining the coordinate information of current location from GPS (Global Position System), and, demonstrate the bit error rate and the signal strength of current location according to the electronic chart of storage and the result of calculation of described second calculating sub module and the 3rd calculating sub module.
Be connected by the universal serial port bus USB interface between described broadcast receiver and the described broadcast signal process device;
Be connected by USB interface between described data acquisition unit and the described broadcast signal process device.
The embodiment of the invention also provides a kind of mobile multimedia broadcast signal monitoring method, adopts a mobile multimedia broadcast signal monitoring equipment that mobile multimedia broadcast signal is monitored; Described mobile multimedia broadcast signal monitoring equipment comprises: broadcast receiver, data acquisition unit and broadcast signal process device; Described broadcast receiver and data acquisition unit are the hardware physical entity; Described broadcast signal process device is for embedding the computer that broadcast signal process functional software module is arranged;
Described mobile multimedia broadcast signal is monitored, specifically comprises:
Receive mobile multimedia broadcast signal by described broadcast receiver, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device;
By described data acquisition unit mobile multimedia broadcast signal is carried out data acquisition, and will gather the broadcast signal data that obtains and export to described broadcast signal process device;
Receive the broadcast signal data that described broadcast receiver is exported by described broadcast signal process device, carry out audio frequency and video by the described broadcast signal process functional software module that embeds by playout software and play; And the broadcast signal data that receives described data acquisition unit output, calculate the parameter value that characterizes the multimedia broadcast channels quality of reception and/or the multimedia broadcast signal quality of reception by described broadcast signal process functional software module.
Above-mentioned mobile multimedia broadcast signal monitoring method provided by the invention, further comprise: obtain the pseudo random sequence that comprises in the broadcast signal data of described broadcast receiver output by described broadcast signal process functional software module, and pursue bit with the pseudo random sequence of making an appointment and compare, add up and calculate the bit error rate that characterizes the multimedia broadcast signal quality of reception.
Above-mentioned mobile multimedia broadcast signal monitoring method provided by the invention further comprises: obtain the current gain value of multimedia broadcast signal by described broadcast signal process functional software module, calculate the signal strength of current multimedia broadcast signal.
Above-mentioned mobile multimedia broadcast signal monitoring method provided by the invention, further comprise: the coordinate information that obtains current location by described broadcast signal process functional software module from GPS (Global Position System), and, demonstrate the bit error rate and the signal strength of current location according to electronic chart and bit error rate that calculates and the signal strength stored.
The mobile multimedia broadcast signal monitoring method that the embodiment of the invention provides comprises: by the broadcast receiver of hardware physical entity realization, receive mobile multimedia broadcast signal, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device.Because the broadcast singal that broadcast receiver adopts hardware to achieve a butt joint to be received is separated to be in harmonious proportion and is deciphered, so conversion speed is fast.Simultaneously,, can realize mobile multimedia broadcast signal is carried out data acquisition at a high speed, and will gather the broadcast signal data that obtains and export to described broadcast signal process device processing by the data acquisition unit that the hardware physical entity is realized.And the broadcast signal process device is undertaken by playout software that audio frequency and video are play and the parameter value calculation of the multimedia broadcast signal quality of reception, can conveniently realize the expansion of various playing functions and computing function.
Description of drawings
The mobile multimedia broadcast signal monitoring equipment structural representation that Fig. 1 provides for the embodiment of the invention;
The internal structure schematic diagram of the broadcast receiver that Fig. 2 provides for the embodiment of the invention;
The internal structure schematic diagram of first tuner that comprises in the broadcast receiver that Fig. 3 provides for the embodiment of the invention;
One of data acquisition unit internal structure schematic diagram that comprises in the broadcast receiver that Fig. 4 provides for the embodiment of the invention;
Two of the data acquisition unit internal structure schematic diagram that comprises in the broadcast receiver that Fig. 5 provides for the embodiment of the invention.
Embodiment
Referring to Fig. 1, the mobile multimedia broadcast signal monitoring equipment that the embodiment of the invention provides comprises broadcast receiver 1, data acquisition unit 2 and broadcast signal process device 3.
Be connected by interface between broadcast receiver 1 and the broadcast signal process device 3, the present invention is not limited to concrete interface type, for example can be connected by the universal serial port bus USB interface; Data acquisition unit 2 also is connected by interface with broadcast signal process device 3, and the present invention also is not limited to concrete interface type, for example also can be connected by USB interface.The function of each device comprises:
Broadcast receiver 1 is the hardware physical entity, is used to receive mobile multimedia broadcast signal, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to broadcast signal process device 3;
Broadcast signal process device 3 is used for the broadcast signal data that receiving broadcast signal receiving system 1 is exported, and carries out audio frequency and video by playout software and plays; And the broadcast signal data that receives data acquisition unit 2 outputs, calculate the relevant parameter value that characterizes the multimedia broadcast signal quality of reception.
Below in conjunction with accompanying drawing, inside concrete structure and the function to broadcast receiver 1, data acquisition unit 2 and broadcast signal process device 3 is described in detail respectively.
Referring to Fig. 2, the internal structure schematic diagram for broadcast receiver 1 comprises: antenna (for convenience of description, being referred to as first reception antenna 11), tuner (for convenience of description, being referred to as first tuner 12) and demodulation chip 13; Wherein:
For example: when demodulation chip 13 receive adopt that OFDM OFDM mode modulates down-convert to the mobile multimedia broadcast signal of baseband signal the time, the baseband signal that receives is carried out the OFDM demodulation; When transmission channel has adopted Reed Solomon code (RS coding) and low density parity check code (LDPC sign indicating number) when encoding, LDPC decoding and RS that this demodulation chip 13 also carries out transmission channel decipher.
The concrete structure of above-mentioned first tuner 12 can adopt structure as shown in Figure 3, comprising: radio frequency amplifier 121, low-converter 122, baseband amplifier 123 and yield value register 124.Wherein:
Low-converter 122 is used for the mobile multimedia broadcast signal of radio frequency amplifier 121 outputs is down-converted to baseband signal, and exports to baseband amplifier 123 and handle;
By radio frequency amplifier 121 and baseband amplifier 123, the mobile multimedia broadcast signal that receives is carried out gain controlling, so that obtain the needed signal amplitude of demodulation.
In the mobile multimedia broadcast signal monitoring equipment that the embodiment of the invention provides, data acquisition unit 2 also adopts the hardware physical entity to realize that its concrete internal structure can be divided into following two kinds:
First kind: the internal structure schematic diagram of data acquisition unit 2 comprises as shown in Figure 4: A/D converter 23 and code check matching unit 24; Wherein:
A/D converter 23, the baseband signal that is used for first tuner 12 output that broadcast receiver 1 is comprised is sampled, and (promptly first tuner 12 outputs signal to demodulation chip 13 processing on the one hand, on the other hand, also output signal to A/D converter 23 in the data acquisition unit 2); And the broadcast signal data that will gather acquisition sends code check matching unit 24 to;
Code check matching unit 24, the bit bit wide that is used for broadcast signal data that A/D converter 23 is sent be converted to and broadcast signal process device 3 between the bit bit wide of transmission, and send the broadcast signal data after the bit bit width conversion to broadcast signal process device 3.
Preferably, in data acquisition unit shown in Figure 42, also include memory, be used for the broadcast signal data after the buffer memory bit bit width conversion.Concrete memory can adopt synchronous dynamic random access memory SDRAM, can be the memory of other types also, such as SBSRAM.In the output broadcast signal data during to broadcast signal process device 3, the broadcast signal data that reads from memory after the bit bit width conversion of buffer memory is exported.Especially,, two memories can be set in data acquisition unit 2, in these two memories, carry out broadcast signal data storage and the alternate operation of reading in order to increase memory space and convenient storage and read operation.
In data acquisition unit shown in Figure 42, data acquisition unit 2 and broadcast receiver 1 are shared antenna and tuner.
Second kind: the internal structure of data acquisition unit 2 also can adopt structure as shown in Figure 5, comprise: antenna (is description document, be referred to as second reception antenna 21), tuner (for convenience of description, being referred to as second tuner 22), A/D converter 23 and code check matching unit 24; Wherein:
The function of A/D converter 23 is identical with above-mentioned first kind of data acquisition unit, be used for the baseband signal of second tuner, 22 outputs is sampled, and the broadcast signal data that obtains of will sampling sends code check matching unit 24 to;
The function of code check matching unit 24 is identical with above-mentioned first kind of data acquisition unit, the bit bit wide that is used for broadcast signal data that A/D converter 23 is transmitted be converted to and broadcast signal process device 3 between the bit bit wide of transmission, and send the broadcast signal data after the bit bit width conversion to broadcast signal process device 3.
Preferably, in data acquisition unit shown in Figure 52, also include memory, be used for the broadcast signal data after the buffer memory bit bit width conversion.Concrete memory can adopt synchronous dynamic random access memory SDRAM, can be the memory of other types also, such as SBSRAM.In the output broadcast signal data during, from memory, read the broadcast signal data after the bit bit width conversion of buffer memory to broadcast signal process device 3.Especially,, also two memories can be set in data acquisition unit 2, in these two memories, carry out broadcast signal data storage and the alternate operation of reading in order to increase memory space and convenient storage and read operation.
In Fig. 4 and data acquisition unit 2 shown in Figure 5, the sample frequency of A/D converter 23 can be controlled and changed by code check matching unit 24.Be specially:
According to the nyquist sampling law, sample frequency is at least 2 times that are sampled signal bandwidth, could guarantee that signal does not overlap.Therefore, code check matching unit 24 can decide the sampling clock frequency of exporting to A/D converter 23 according to the bandwidth of the mobile multimedia broadcast signal of nyquist sampling law and actual acquisition.If the bandwidth of mobile multimedia broadcast signal is 8Mhz, then, could guarantee that signal does not overlap according to the nyquist sampling law sample frequency of needs 16Mhz at least.If the observation signal band outer+/-signal of 1Mhz, so just need to use the sample frequency of 20Mhz.In the reality, the sampling clock frequency that code check matching unit 24 is exported to A/D converter 23 for example can be 16Mhz/20Mhz/30Mhz etc.
In addition, the output bit bit wide of the broadcast signal data of A/D converter 23 outputs is not fixed, and promptly adopts different A/D converters, and its output bit bit wide may be different.For example exporting the bit bit wide can be 8bit, and 9bit also can be 12bit, 14bit etc.Output bit bit wide is high more, and the sampling performance is good more, but the realization of the hardware of A/D converter 23 is complicated more, and the price of the A/D converter chip of corresponding function is also expensive more.Therefore, take all factors into consideration cost performance, can select for use the A/D converter of 10bit bit wide that mobile multimedia broadcast signal is sampled in the reality.
Because the output bit bit wide of the broadcast signal data of A/D converter 23 outputs might be not equal to the bit bit wide of interface transmission between data acquisition unit 2 and the broadcast signal process device 3, for example: the broadcast signal data of A/D converter 23 output 10bit bit wides, and be connected by the universal serial port bus USB interface between data acquisition unit 2 and the broadcast signal process device 3, the transmission signals bit wide of this USB interface is 8bit, like this, just need be carried out the conversion of the bit bit wide of data by code check matching unit 24, the broadcast signal data that is about to the 10bit bit wide is converted to the broadcast signal data of 8bit bit wide.
Code check matching unit 24 can adopt the various hardware of code check coupling (being the conversion of data bit bit wide) of realizing of the prior art to realize.For example, can adopt programmable gate array FPGA to realize that the present invention does not limit this.
Broadcast signal process device 3 in the mobile multimedia broadcast signal monitoring equipment that the embodiment of the invention provides has the computer of broadcast signal process functional software module for embedding.Wherein, broadcast signal process functional software module comprises at least:
Play submodule, be used for the broadcast signal data of receiving broadcast signal receiving system 1 output, carry out the decoding of demultiplexing and audio/video compression, and carry out Voice ﹠ Video by playout software and play;
First calculating sub module is used to receive the broadcast signal data that data acquisition unit 2 is exported, and calculates the time domain impulse response that characterizes the multimedia broadcast channels quality of reception.
Wherein, the concrete function of playing submodule comprises: understanding of broadcast receiver 1 output is in harmonious proportion multiplexing structure and the source encoding that comprises in the broadcast signal data of channel decoding after handling carries out demultiplexing and decoding processing.That is: play submodule and need carry out following treatment step:
The first step, the multiplex protocol that the broadcast signal data that receives is stipulated according to mobile multimedia broadcast signal carries out de-multiplex operation;
Second step, to the broadcast signal data after the demultiplexing, carry out the audio frequency and video compression coding again, such as, for adopted at transmitting terminal H.264, MPEG2 or AVS compressed format carries out the video data that overcompression handles and decompresses (specifically need being complementary with the source encoding situation of transmitting terminal), plays out video image by video jukebox software then.
Wherein, the concrete function of first calculating sub module comprises: according to the multimedia broadcast signal sampled data of data acquisition unit 2 outputs, calculate the channel impulse response estimated value of frequency domain, be specially:
In the formula (1), for to be input to the mobile multimedia broadcast signal that transmits in the channel, n (t) is an interchannel noise to S (t), and h (t) is a channel time domain impulse response theoretical value,
For carrying out convolution algorithm; The convolution algorithm result of mobile multimedia broadcast signal and interchannel noise and h (t), output signal after the expression mobile multimedia broadcast signal transmits through channel, 2 pairs of these output signals of data acquisition unit are sampled, sampled data is sent to first calculating sub module, carry out fast fourier transform (fft) by first calculating sub module, obtain
Wherein
Be the frequency domain estimated value of broadcast signal data, H (f) is a frequency domain impulse response theoretical value.
Obtain according to formula (1)
After, calculate the channel impulse response estimated value that obtains frequency domain according to following formula (2) again
The channel impulse response estimation value of the frequency domain that formula (2) is obtained again
Carry out quick inverse-Fourier transform (ifft), obtain the time domain impulse response of channel, that is:
What the channel time domain impulse rang sign is the characteristic of channel, can be applicable to the design implementation of broadcast single frequency network.
Broadcast signal process functional software module can also comprise: the pseudo random sequence sub module stored and second calculating sub module; Wherein:
The pseudo random sequence sub module stored is used to store the pseudo random sequence (adopting identical pseudo random sequence with the mobile multimedia broadcast signal transmitting terminal) of making an appointment;
Second calculating sub module, be used for obtaining the pseudo random sequence that the broadcast signal data of broadcast receiver 1 output comprises, and with the pseudo random sequence sub module stored in the pseudo random sequence of storing pursue bit relatively, count pseudo random sequence and wrong amount of bits taken place and calculated bit error rate.
Broadcast signal process functional software module can also comprise: the 3rd calculating sub module, the yield value register 124 that is used for first tuner 12 that comprises from broadcast receiver 1 obtains the current gain value of mobile multimedia broadcast signal, calculates the signal strength of current multimedia broadcast signal.Specifically can adopt following two kinds of methods of the prior art to calculate signal strength:
Method one: the yield value and the signal strength correspondence table of inquiry storage obtain corresponding signal strength by current gain value;
Method two: the fitting formula that provides by first tuner 12 directly calculates signal strength.
Broadcast signal process functional software module can also comprise: electronic chart sub module stored and locating and displaying submodule; Wherein:
The electronic chart sub module stored is used for storing electronic map;
The locating and displaying submodule, be used for obtaining the coordinate information of current location from GPS (Global Position System), and, on electronic chart, demonstrate the bit error rate and the signal strength of current location according to the signal strength that the electronic chart of storage and the bit error rate that calculates of above-mentioned second calculating sub module and above-mentioned the 3rd calculating sub module calculate.
According to the mobile multimedia broadcast signal monitoring equipment that the above embodiment of the present invention provides, a kind of corresponding mobile multimedia broadcast signal monitoring method comprises:
Receive mobile multimedia broadcast signal by broadcast receiver 1, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device 3;
Carry out data acquisition by 2 pairs of mobile multimedia broadcast signals of data acquisition unit, and will gather the broadcast signal data that obtains and export to broadcast signal process device 3;
By the broadcast signal data of broadcast signal process device 3 receiving broadcast signal receiving systems 1 output, carry out audio frequency and video by the broadcast signal process functional software module that embeds by playout software and play; And the broadcast signal data that receives data acquisition unit 2 outputs, calculate the parameter value that characterizes the multimedia broadcast signal quality of reception by broadcast signal process functional software module.
The mobile multimedia broadcast signal monitoring method also comprises: obtained the pseudo random sequence that comprises in the broadcast signal data of broadcast receiver output by broadcast signal process functional software module, and pursue bit with the pseudo random sequence of making an appointment and compare, add up and calculate bit error rate.
The mobile multimedia broadcast signal monitoring method also comprises: obtain the current gain value of multimedia broadcast signal by broadcast signal process functional software module, calculate the signal strength of current multimedia broadcast signal.
The mobile multimedia broadcast signal monitoring method also comprises: the coordinate information that is obtained current location by broadcast signal process functional software module from GPS (Global Position System), and, demonstrate the bit error rate and the signal strength of current location according to electronic chart and bit error rate that calculates and the signal strength stored.
In sum, the mobile multimedia broadcast signal monitoring method that the embodiment of the invention provides, broadcast receiver by the realization of hardware physical entity, receive mobile multimedia broadcast signal, the mobile multimedia broadcast signal that receives is carried out exporting to the broadcast signal process device after demodulation and the channel decoding.Because the broadcast singal that broadcast receiver adopts hardware to achieve a butt joint to be received is separated to be in harmonious proportion and is deciphered, so conversion speed is fast.Simultaneously, data acquisition unit also adopts the hardware physical entity in the mobile multimedia broadcast signal monitoring equipment that the embodiment of the invention provides, can realize mobile multimedia broadcast signal is carried out data acquisition at a high speed, and will gather the broadcast signal data that obtains and export to the processing of broadcast signal process device.And the broadcast signal process device, adopting playout software to carry out audio frequency and video plays, and adopt computed in software to go out to characterize the various parameter values of the multimedia broadcast signal quality of reception, time domain impulse response, signal strength and bit error rate etc. as signal can realize the expansion of various playing functions and computing function easily by software upgrading.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (4)
1. a mobile multimedia broadcast signal monitoring method is characterized in that, adopts a mobile multimedia broadcast signal monitoring equipment that mobile multimedia broadcast signal is monitored; Described mobile multimedia broadcast signal monitoring equipment comprises: broadcast receiver, data acquisition unit and broadcast signal process device; Described broadcast receiver and data acquisition unit are the hardware physical entity; Described broadcast signal process device is for embedding the computer that broadcast signal process functional software module is arranged;
Described mobile multimedia broadcast signal is monitored, specifically comprises:
Receive mobile multimedia broadcast signal by described broadcast receiver, the mobile multimedia broadcast signal that receives is carried out demodulation and channel decoding, and the broadcast signal data after will deciphering is exported to described broadcast signal process device;
By described data acquisition unit mobile multimedia broadcast signal is carried out data acquisition, and will gather the broadcast signal data that obtains and export to described broadcast signal process device;
Receive the broadcast signal data that described broadcast receiver is exported by described broadcast signal process device, carry out audio frequency and video by the described broadcast signal process functional software module that embeds by playout software and play; And the broadcast signal data that receives described data acquisition unit output, calculate the parameter value that characterizes the multimedia broadcast channels quality of reception and/or the multimedia broadcast signal quality of reception by described broadcast signal process functional software module.
2. monitoring method as claimed in claim 1, it is characterized in that, further comprise: obtain the pseudo random sequence that comprises in the broadcast signal data of described broadcast receiver output by described broadcast signal process functional software module, and pursue bit with the pseudo random sequence of making an appointment and compare, add up and calculate the bit error rate that characterizes the multimedia broadcast signal quality of reception.
3. monitoring method as claimed in claim 2 is characterized in that, further comprises: obtain the current gain value of multimedia broadcast signal by described broadcast signal process functional software module, calculate the signal strength of current multimedia broadcast signal.
4. monitoring method as claimed in claim 3, it is characterized in that, further comprise: the coordinate information that obtains current location by described broadcast signal process functional software module from GPS (Global Position System), and, demonstrate the bit error rate and the signal strength of current location according to electronic chart and bit error rate that calculates and the signal strength stored.
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| CN101800873B (en) * | 2010-03-05 | 2011-09-28 | 杭州华三通信技术有限公司 | Method and device for storing video monitoring data |
| CN102223566A (en) * | 2010-04-16 | 2011-10-19 | 北京广电天地信息咨询有限公司 | Testing method and system for network coverage of ground broadcast network of digital television |
| CN102098698A (en) * | 2010-12-02 | 2011-06-15 | 上海电机学院 | Method and system for testing error rate |
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| CN108768505B (en) * | 2018-06-19 | 2020-09-11 | 湖南斯北图科技有限公司 | Internet of things satellite broadcast data acquisition method and device |
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