CN103179468A - Multimedia data transmission device, system and method - Google Patents
Multimedia data transmission device, system and method Download PDFInfo
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- CN103179468A CN103179468A CN2012100423257A CN201210042325A CN103179468A CN 103179468 A CN103179468 A CN 103179468A CN 2012100423257 A CN2012100423257 A CN 2012100423257A CN 201210042325 A CN201210042325 A CN 201210042325A CN 103179468 A CN103179468 A CN 103179468A
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Abstract
The invention discloses a multimedia data transmission device, and relates to the data transmission technical field. The multimedia data transmission device comprises a data processing module, an encoding/decoding module and a receiving and dispatching module which are sequentially connected, and further comprises an anti-shaking caching module. The anti-shaking caching module is connected with the encoding/decoding module and the receiving and dispatching module, and is used for sending the multifunctional data received by the receiving and dispatching module at preset time intervals back to the encoding/decoding module to be decoded. The invention further discloses a voice transmission system and a voice transmission method. Since received voice data packages can be replayed at certain time intervals, voice vibration is avoided, and voice transmission quality is improved.
Description
Technical field
The present invention relates to the Multimedia Data Transmission technical field, particularly a kind of Multimedia Data Transmission device, system and method.
Background technology
The background music in residential quarter and park is analogue transmission mostly at present, and tonequality can variation when long-distance transmissions.Adopt Digital Transmission can address this problem, as adopt the voice transfer mode of wireless network, but in this transmission means, when arriving same destination due to the packet packet that the factors such as transmission path difference, network congestion cause in network, order may be out of order, and the time interval that any two packets arrive is not identical yet.Although out of order problem can solve by the mechanism of resetting, make voice play in order, but the time interval of two packet arrival is not identical yet, can cause the shake of sound, discontinuous, this can reduce the quality of voice, if broadcast is video, can cause shake and the flicker of picture, impact is watched.
Summary of the invention
The technical problem that (one) will solve
The technical problem to be solved in the present invention is: in the Multimedia Data Transmission process, how to avoid the shake of sound and picture, to improve the quality of voice and picture.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of Multimedia Data Transmission device, comprise: the data processing module, coding/decoding module and the transceiver module that connect successively, also comprise: with described coding/decoding module be connected the anti-shake cache module that transceiver module all is connected, be used for multi-medium data that described transceiver module is received and send it back described coding/decoding module and decode in the interval to schedule.
Wherein, also comprise: package module, described package module comprises:
Packing device connects described coding/decoding module and described transceiver module, sends to described transceiver module after the multi-medium data packing after being used for encoding;
De-packetizer connects described anti-shake cache module and described transceiver module, and the multi-medium data after being used for resetting and unpacking sends to described anti-shake cache module.
Wherein, described transceiver module is zigbee module or radio-frequency module.
The present invention also provides a kind of Multimedia Transmission System, comprise: master controller and at least one multimedia player, described master controller comprises: Multimedia Data Transmission device as described in above-mentioned any one and with as described in Multimedia Data Transmission the device loud speaker, microphone and the display screen that are connected; Described multimedia player comprises: described Multimedia Data Transmission device and the loud speaker that is connected with described Multimedia Data Transmission device, described master controller and described multimedia player are by the transceiver module wireless connections.
Wherein, described multimedia player also comprises the display that is connected with described Multimedia Data Transmission device.
Wherein, described voice-transmission system also comprises at least one intercom, described intercom comprises: described Multimedia Data Transmission device and the loud speaker and the microphone that are connected with described Multimedia Data Transmission device, described master controller and intercom are by the transceiver module wireless connections.
Wherein, described intercom also comprises the display that is connected with described Multimedia Data Transmission device.
The present invention also provides a kind of multimedia data transmission method, at the multi-medium data transmitting terminal, multi-medium data after coding is sent, at the multi-medium data receiving terminal, the multi-medium data that receives is stored in buffer memory, and described multi-medium data is read at the interval from buffer memory on schedule, with the multi-medium data that reads decode, D/A changes to reduce original multimedia messages.
Wherein, at the multi-medium data transmitting terminal, also described multi-medium data is packaged into the multi-medium data bag before sending, at the multi-medium data receiving terminal, is stored in buffer memory after the multi-medium data bag is reset and unpacked.
Wherein, described predetermined time interval is the time interval that the multi-medium data transmitting terminal sends multi-medium data.
Wherein, described predetermined time interval calculates in the following way: the time interval of N the multimedia number that multi-medium data receiving terminal statistics receives is T, and described predetermined time interval is T/ (N-1)
(3) beneficial effect
The present invention broadcasts by the multi-medium data bag that receives is carried out playback by certain time interval, and the sound of avoiding and the shake of picture have improved the quality of Multimedia Data Transmission.
Description of drawings
Fig. 1 is a kind of Multimedia Data Transmission apparatus structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the another kind of Multimedia Data Transmission apparatus structure schematic diagram of the embodiment of the present invention;
Fig. 3 is a kind of Multimedia Transmission System structural representation of the embodiment of the present invention;
Fig. 4 is the time interval schematic diagram between VoP in a kind of multimedia data transmission method of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, multimedia transmission apparatus of the present invention comprises: the data processing module, coding/decoding module and the transceiver module that connect successively.Transceiver module is the radio receiving transmitting modules such as Zigbee or radio frequency, and data processing module is completed the functions such as A/D conversion, D/A conversion and filtering.Multi-medium data comprises voice data, video data or audio, video data.
When playing for the multi-medium data that receives is wrapped in, sound and picture do not produce shake, improve playing fluency, and Multimedia Data Transmission device of the present invention also comprises is connected the anti-shake cache module that is connected with transceiver module with the coding/decoding module.Anti-shake cache module is used for from transceiver module receiving multimedia data and buffer memory, and this multi-medium data is sent it back described coding/decoding module and decodes in the interval to schedule.
Anti-shake cache module in Multimedia Data Transmission device of the present invention makes the multi-medium data that receives by the certain time interval playback, has avoided the Internet Transmission time-delay to the sound of playback generation and the shake of picture, has improved play quality.
Pass through in the transceiver module transmitting procedure in reality, in process as zigbee or the transmission of other wireless module, can there be network delay, when especially network quality is relatively poor, the multi-medium data that the transceiver module of receiving terminal receives out of order arrangement often, the sound when therefore playing and picture can and original difference.Sound and picture in order to guarantee to play can not change, preferably, multimedia transmission apparatus of the present invention also comprises package module, as shown in Figure 2, multi-medium data after package module is used for encoding is packaged into the data packet format of being convenient to transmit, and maybe the packet with this form unpacks.Package module generally includes RTP/RTCP packing device, RTP/RTCP de-packetizer, (real time transport protocol: Real-time Transport Protocol, be called for short RTP, RTP Control Protocol: RTP Control Protocol, be called for short RTCP).
Particularly, the RTP/RTCP packing device connects the coding/decoding module, sends to transceiver module after the multi-medium data packing after being used for encoding.The RTP/RTCP de-packetizer is between anti-shake cache module and transceiver module.The RTP/RTCP de-packetizer is used for the packet of receiving is reset in order and unpacked, and the multi-medium data after resetting and unpacking is sent to anti-shake cache module.
The present invention also provides a kind of Multimedia Transmission System that utilizes above-mentioned Multimedia Data Transmission device to consist of, and as shown in Figure 3, comprises master controller and at least one multimedia player.Master controller comprises above-mentioned Multimedia Data Transmission device and the loud speaker, microphone and the display screen that are connected with this Multimedia Data Transmission device.Multimedia player can be speech player and audio/video player.Speech player comprises: above-mentioned Multimedia Data Transmission device and the loud speaker that is connected with this Multimedia Data Transmission device.Audio/video player comprises: above-mentioned Multimedia Data Transmission device and the loud speaker and the display that are connected with this Multimedia Data Transmission device.
Transceiver module in the Multimedia Data Transmission device is take the Zigbee module as example, and several speech players have formed a Zigbee network.In the park or the residential quarter play the scene of background music, speech player is arranged in different places, forms the network of a background music broadcast, master controller and speech player carry out voice transfer by the Zigbee module.The display of master controller can show the music of current broadcast, and microphone can be used for issuing documentary whip and broadcasting.Because speech player only need to be play voice, can include only decoder in the coding/decoding module.
If want displaying video, audio/video player also can be arranged in whole Zigbee network.
For convenient and master controller is mutual, also comprise at least one intercom in this system.This intercom comprises above-mentioned Multimedia Data Transmission device and the loud speaker and the microphone that are connected with this Multimedia Data Transmission device, transceiver module in same this Multimedia Data Transmission device is also the Zigbee module, realizes the intercommunication of intercom and master controller by the Zigbee module.In order to carry out video calling, preferably, this intercom also comprises the display that this Multimedia Data Transmission device connects.
The present invention also provides a kind of voice transmission method, take above-mentioned Multimedia Transmission System as example illustrates voice transmission method of the present invention.
In master controller, digital multimedia signal is delivered to coding/decoding module (if analog signal, first carry out the A/D conversion by data processing module), the multi-medium data after the coding/decoding module is encoded to digital multimedia signal by certain media formats.Multi-medium data after the Zigbee module will be encoded sends.The Zigbee module of multimedia player receives this multi-medium data.The multi-medium data that receives is stored in the memory of anti-shake cache module, this anti-shake cache module interval on schedule reads multi-medium data from memory, and send to the coding/decoding module to decode the multi-medium data that reads, carry out D/A conversion reduction raw tone by data processing module at last.
The method makes the multi-medium data that receives by the certain time interval playback, has avoided the Internet Transmission time-delay to the sound of playback generation and the shake of picture, has improved play quality.
For the sequence consensus that guarantees that multi-medium data arrives, sound during broadcast and picture can not change, preferably, after coding, multi-medium data utilizes the RTP/RTCP packing device that this multi-medium data is packed before sending, the multi-medium data bag that formation can be transmitted, the multi-medium data bag after the Zigbee module will be packed sends.The Zigbee module of multimedia player will receive the multi-medium data bag and give the RTP/RTCP de-packetizer and unpack, and can reset according to the original order of packet when unpacking.Multi-medium data after resetting and unpacking is stored in the memory of anti-shake cache module.This anti-shake cache module interval on schedule reads multi-medium data from memory, and sends to the coding/decoding module to decode the multi-medium data that reads, and carries out D/A conversion reduction raw tone by data processing module at last.
Wherein above-mentioned predetermined time interval can send the time interval of multi-medium data bag for the multi-medium data transmitting terminal, as shown in Figure 4:
Send A, B, C, four bags of D, wherein the transmission interval of A, B, C, four bags of D is 20ms.Wherein A, C, three bags of D are 10ms through the forward delay interval of network, and due to the uncertainty of network, the forward delay interval of B packet network is 20ms.The time of advent of A, B, C, four bags of D is as shown in the second row of Fig. 3 so: A=30ms, B=60ms, C=70ms, D=90ms, its interval is respectively 30ms, 10ms, 20ms, if simply according to this is sequentially play at present, that tonequality that plays back is certain to primary sound, larger going bad arranged.
The packet that the time span storing received at appointment transmission interval (20ms) arrives before packet is decoded, as shown in Fig. 4 the third line, at this moment the time interval of A, B, C, D reverts to the time 20ms of transmission, and then playback.Thereby eliminate shake, finally can with level and smooth mode voice playback, obtain voice quality preferably.
Predetermined time interval also can calculate according to the statistics of receiving terminal, and the time interval that N the multimedia that multi-medium data receiving terminal statistics receives counted bag is T, and described predetermined time interval is T/ (N-1), as shown in Figure 4:
Transmitting terminal sends a bag every 20ms, sends from A to begin to be sent completely to D, sends four bag 60ms of ABCD (transmitting time); Be on the time at receiving terminal, A 30msB 60ms C 70ms D 90ms time of reception has also been used 90-30=60ms, and the time interval of receiving terminal calculating is 60ms/ (4-1)=20ms, conforms to the interval that sends.According to the interval of calculating (20ms), decode (playback), suitable when tonequality is with transmission.Computing formula is: predetermined time interval=(T
N-T1)/(N-1).This computational process is dynamic calculation, and wherein granularity N has determined the accuracy of calculating.
Said process has been realized the transmission of multi-medium data between master controller and speech player and broadcast glibly, as: the transmission of background music and broadcasting in residential quarter or park.Consider characteristic and the relaying requirement of the transmission of Zigbee, Zigbee traffic load ability is about 120kb/s.The monophonic music that will transmit mp3 tonequality on this bandwidth just needs compression, considers the demand of bandwidth and tonequality, the coding/decoding module adopt the compression method of Vorbis carry out music only to transmission.Be the transmitted in both directions of voice between master controller and speech talkback device, the method for its transmission and above-mentioned transmission method are similar, herein Ao Shu no longer.When considering Zigbee as relay transmission, pay(useful) load is about 120kb/s, and one-way voice can only account for the bandwidth of 50kb/s at most when carrying out the voice bidirectional transmission, so voice also must compress.Consider the needs of tonequality and bandwidth, adopt the Speex/iLBC method to carry out compress speech.
Above execution mode only is used for explanation the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (11)
1. Multimedia Data Transmission device, comprise: the data processing module, coding/decoding module and the transceiver module that connect successively, it is characterized in that, also comprise: with described coding/decoding module be connected the anti-shake cache module that transceiver module all is connected, be used for multi-medium data that described transceiver module is received and send it back described coding/decoding module and decode in the interval to schedule.
2. Multimedia Data Transmission device as claimed in claim 1, is characterized in that, also comprises: package module, and described package module comprises:
Packing device connects described coding/decoding module and described transceiver module, sends to described transceiver module after the multi-medium data packing after being used for encoding;
De-packetizer connects described anti-shake cache module and described transceiver module, and the multi-medium data after being used for resetting and unpacking sends to described anti-shake cache module.
3. Multimedia Data Transmission device as claimed in claim 1 or 2, is characterized in that, described transceiver module is zigbee module or radio-frequency module.
4. Multimedia Transmission System, it is characterized in that, comprise: master controller and at least one multimedia player, described master controller comprises: Multimedia Data Transmission device as described in any one in claim 1～3 and with as described in Multimedia Data Transmission the device loud speaker, microphone and the display screen that are connected; Described multimedia player comprises: described Multimedia Data Transmission device and the loud speaker that is connected with described Multimedia Data Transmission device, described master controller and described multimedia player are by the transceiver module wireless connections.
5. Multimedia Transmission System as claimed in claim 4, is characterized in that, described multimedia player also comprises the display that is connected with described Multimedia Data Transmission device.
6. Multimedia Transmission System as described in claim 4 or 5, it is characterized in that, described voice-transmission system also comprises at least one intercom, described intercom comprises: described Multimedia Data Transmission device and the loud speaker and the microphone that are connected with described Multimedia Data Transmission device, described master controller and intercom are by the transceiver module wireless connections.
7. Multimedia Transmission System as claimed in claim 6, is characterized in that, described intercom also comprises the display that is connected with described Multimedia Data Transmission device.
8. multimedia data transmission method, at the multi-medium data transmitting terminal, multi-medium data after coding is sent, it is characterized in that, at the multi-medium data receiving terminal, the multi-medium data that receives is stored in buffer memory, and described multi-medium data is read at the interval from buffer memory on schedule, with the multi-medium data that reads decode, D/A changes to reduce original multimedia messages.
9. multimedia data transmission method as claimed in claim 8, it is characterized in that, at the multi-medium data transmitting terminal, also described multi-medium data is packaged into the multi-medium data bag before sending, at the multi-medium data receiving terminal, after being reset and unpack, the multi-medium data bag is stored in buffer memory.
10. multimedia data transmission method as claimed in claim 8 or 9, is characterized in that, described predetermined time interval is the time interval that the multi-medium data transmitting terminal sends multi-medium data.
11. multimedia data transmission method as claimed in claim 8 or 9, it is characterized in that, described predetermined time interval calculates in the following way: the time interval of N the multimedia number that multi-medium data receiving terminal statistics receives is T, and described predetermined time interval is T/ (N-1).
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| CN101707696A (en) * | 2009-11-20 | 2010-05-12 | 长沙行成信息科技有限公司 | Realization method and front-end service system of instant interactive digital TV |
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| US20030039312A1 (en) * | 2001-08-23 | 2003-02-27 | Michael Horowitz | System and method for video error concealment |
| CN1929607A (en) * | 2006-08-03 | 2007-03-14 | 爱普拉斯通信技术（北京）有限公司 | Device and method for transmitting media flow data |
| CN1976465A (en) * | 2006-11-30 | 2007-06-06 | 中兴通讯股份有限公司 | Multi-media broadcasting channel fast playing method |
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