CN102685143A - Audio data transmission method, client side and server - Google Patents
Audio data transmission method, client side and server Download PDFInfo
- Publication number
- CN102685143A CN102685143A CN201210163296XA CN201210163296A CN102685143A CN 102685143 A CN102685143 A CN 102685143A CN 201210163296X A CN201210163296X A CN 201210163296XA CN 201210163296 A CN201210163296 A CN 201210163296A CN 102685143 A CN102685143 A CN 102685143A
- Authority
- CN
- China
- Prior art keywords
- packets
- audio data
- server
- audio
- transmission
- 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.)
- Granted
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses an audio data transmission method, a client side and a server. The audio data transmission method provided by the embodiment of the invention comprises the following steps that: the client side sends an audio transmission beginning request to the server; the client side sends audio data packets of the audio data to the server one by one in an uninterrupted mode after the server prepares to receive the audio data according to the audio transmission beginning request, wherein the client directly sends the next audio data packet after sending one audio data packet without waiting for the response from the server in the uninterrupted mode; and the client side sends an audio transmission ending request to the server after all the audio data packets of the audio data are sent to the server.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of transmission method of voice data and client, server.
Background technology
Development along with mobile Internet; Mobile applied more and more based on the Audiotechnica exploitation; As based on the various voice applications on the cell phone intelligent operating system; Typically, like application products relevant such as community's friend-making, SPACE APPLICATION, instant messagings, all require real-time audio effect preferably with Audiotechnica.How more fast, transmitting audio data timely, become the major criterion of weighing application performance.
The transmission means of existing voice data referring to Fig. 1, mainly comprises following processing: user end to server request transmitting audio data, server is represented ready to client, can begin to receive.User end to server sends packets of audio data 1, after receiving the successful respond of server, sends packets of audio data 2 to server; After receiving the successful respond of server; The next packets of audio data of redispatching, repetitive operation is sent until all packets of audio data and to be finished.
Existing audio data transmission mode has following defective at least:
In the existing scheme when the transmitting audio data bag; Client must receive server on could continue the transmission of next packets of audio data after the response of a packets of audio data; The client and server both sides' is too frequent alternately, is easy to cause the error rate in the transfer of data higher; And because both sides' interaction times is more, cause the time-delay in the network bigger, directly reduced the live effect of audio data transmission.
Summary of the invention
The transmission method of a kind of voice data provided by the invention and client, server are to solve the existing problem that scheme transfer of data error rate is higher, transmission delay is bigger.
For achieving the above object, the embodiment of the invention has adopted following technical scheme:
The embodiment of the invention provides a kind of transmission method of voice data, and said method comprises:
User end to server sends audio transmission and begins request;
After server begins according to said audio transmission to ask to be ready to receive voice data; Client adopts uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data; Wherein, under said uninterrupted mode, client is after having sent a packets of audio data; Do not wait for from the replying of server, directly carry out the transmission of next packets of audio data;
After the packets of audio data of said voice data all was sent to server, user end to server sent the audio transmission ending request.
The embodiment of the invention also provides a kind of client, and said client comprises transmission initiation unit, uninterrupted transmitting element and end of transmission unit,
The unit is initiated in said transmission, is used for sending audio transmission to server and begins request;
Said uninterrupted transmitting element; Be used for server begins request and is ready to receive voice data according to said audio transmission after, adopting uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data, wherein; Under said uninterrupted mode; Client is not waited for from the replying of server after having sent a packets of audio data, is directly carried out the transmission of next packets of audio data;
Said end of transmission unit is used for after the packets of audio data of said voice data all is sent to server, sends the audio transmission ending request to server.
The embodiment of the invention also provides a kind of server, and said server comprises uninterrupted receiving element, is used for after the audio transmission according to client begins to ask to be ready to receive voice data; The packets of audio data of the voice data that the uninterrupted mode of reception customer end adopted is packet-by-packet sent; Wherein, under said uninterrupted mode, client is after having sent a packets of audio data; Do not wait for from the replying of server, directly carry out the transmission of next packets of audio data; And, after client finishes the whole transmissions of the packets of audio data of said voice data, receive the audio transmission ending request that client is sent.
The beneficial effect of the embodiment of the invention is:
This programme has proposed a kind of new audio transmission mode through the in-depth analysis to audio data transmission.The restriction of must waiting for server when sending single packets of audio data replying through removing client; Significantly reduced the mutual of client and server in audio data transmission; Improved interactive efficiency; Greatly reduce the error rate of transfer of data, reduced network delay, guaranteed the real-time of audio data transmission.
Description of drawings
Fig. 1 is the transmission means flow chart of existing voice data;
The transmission method schematic flow sheet of a kind of voice data that Fig. 2 provides for the embodiment of the invention one;
The transmission method schematic flow sheet of a kind of voice data that Fig. 3 provides for the embodiment of the invention two;
The structural representation of the client and server that Fig. 4 provides for the embodiment of the invention three.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
The transmission method of a kind of voice data that the embodiment of the invention one provides, referring to Fig. 2, said method comprises:
21: user end to server sends audio transmission and begins request.
22: after server begins according to said audio transmission to ask to be ready to receive voice data; Client adopts uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data; Wherein, under said uninterrupted mode, client is after having sent a packets of audio data; Do not wait for from the replying of server, directly carry out the transmission of next packets of audio data.
23: after the packets of audio data of said voice data all was sent to server, user end to server sent the audio transmission ending request.
The embodiment of the invention adopts voice data is divided into a plurality of packets of audio data when transmitting audio data, realizes the mode of voice data communication through the transmitting audio data bag.
The transmission method of the voice data that the embodiment of the invention two is provided below in conjunction with Fig. 3 describes.Different among audio transmission flow process shown in Fig. 3 and Fig. 1; Client among Fig. 3 is packet-by-packet sent in the process of voice data; No longer need the waiting for server end to return and receive replying of success or not; But disposable sent whole packets continuously after, send ending request, this finishes announcement server alternately.Flow process after this optimization can the reduced data bag transmission mutual, specifically comprise following processing:
31: user end to server sends audio transmission and begins request.
Above-mentioned audio transmission begins to ask and can carry indication information in this packet for the packet of a request audio transmission, is used to indicate the size of audio data format waiting for transmission, sample rate and each packets of audio data.
32: server prepares to receive data.
After server receives that audio transmission begins request, start and the relevant processing unit of reception voice data, and judge the transfer of data that to support this according to above-mentioned indication information; For example; When server can be supported the indicated audio data format of client, sample rate and each packets of audio data big or small, reply to what client returned success, represent ready; Can begin to receive voice data, referring to the scene shown in Fig. 3; And audio transmission is begun processing of request is made mistakes or server when not supporting the data format of audio transmission in beginning to ask when server, and return replying of refusal transmission to client, during replying, this can comprise the concrete reason of makeing mistakes or refuse to transmit.Client can resend audio transmission and begin request according to after these concrete reason adjustment.
33: client is sent first packets of audio data.
Client receives the successful respond of server, know that server is ready after, send first packets of audio data (packets of audio data 1).
34: client is sent second packets of audio data (packets of audio data 2).
After packets of audio data 1 transmission finished, client not waiting for server was directly sent packets of audio data 2 to the processing of packets of audio data 1.To be client need not to receive server to the transmission of packets of audio data 2 is prerequisite to the feedback information of packets of audio data 1.
In the present embodiment; The uninterrupted mode of customer end adopted packet-by-packet is sent to server with all packets of audio data of voice data, and under this uninterrupted mode, client is after having sent a packets of audio data; Do not wait for from the replying of server, directly carry out the transmission of next packets of audio data.
Comprise packet index and packet main body in the packets of audio data that present embodiment sent, said packet index is used for the sending order of identification audio packet and this packets of audio data.For example, can to identify the sending order of packets of audio data 1 and packets of audio data 1 be the 1st to the packet index of packets of audio data 1; The sending order that the packet index of packets of audio data 2 can identify packets of audio data 2 and packets of audio data 2 is the 2nd, and perhaps, the sending order of packets of audio data 2 is after packets of audio data 1.
Utilize the packet index to guarantee to know and whether successfully receive all packets of audio data at server side; And if successfully do not receive; Also can know the not sequence number of the packets of audio data of success reception according to the packet index, then notify client to retransmit these packets of audio data.
35: user end to server sends end notification.
After client has been sent all packets of audio data, send the audio transmission ending request to server.This audio transmission ending request can be indicated the overall budget number of the packets of audio data that client transmits.
36: the server echo reply.
After server receives the audio transmission ending request; Whether the bag number of the packets of audio data that inspection receives equates with the indicated overall budget number of above-mentioned client; If equate, expression has successfully received all packets of audio data, and server returns success replys; Close relevant processing unit, this audio data transmission finishes; If unequal, the expression server does not have all packets of audio data of complete reception, and server returns failure and replys.If the reason of failure is that the data of client are sent or packet loss etc. has appearred in Network Transmission; During replying, the failure that server returns comprises the not packet index of the packets of audio data of success reception; Client is receiving failure when replying, and retransmits the packet index indicated packets of audio data of failure in replying; If the reason of failure is processing mistake or other unknown causes of server one side, the server record error reason, and finish this data transfer.
Further; Storage for data; Server provides following caching mechanism: server whenever receives a packets of audio data; Packet index according to this packets of audio data is stored in this packets of audio data in the corresponding region of buffer memory, and when the memory data output in the buffer memory reached predetermined value, server write database with the data in the buffer memory; The packets of audio data that empties buffer memory and will newly receive is stored in the buffer memory after emptying, and circulation is carried out this operation and accepted all packets of audio data until server.This caching mechanism helps the fast access to voice data, improves the decode rate of voice data, improves the real-time of voice data.
Further; Server no longer carries out " data declare heavily " operation in the present embodiment, and the packets of audio data that repeats to send for client is only according to the corresponding region of packet index stores appointment in the buffer memory; If repeat to receive; Promptly when repeating to receive same packets of audio data, the data of storage write the data content that the last time receives again before the deletion.Promptly when client has been sent first packets of audio data earlier; Server is stored in first packets of audio data in the first area of buffer memory according to the packet index of first packets of audio data; When client repeats again to have sent second packets of audio data identical with first packets of audio data; The packet index indication that server receives second packets of audio data and second packets of audio data is stored to said first area with second packets of audio data, then server first packets of audio data of directly having stored in the said first area of deletion and second packets of audio data is stored to the first area.
This programme has proposed a kind of new audio transmission mode through the in-depth analysis to audio data transmission.The restriction of must waiting for server when sending single packets of audio data replying through removing client; Significantly reduced the mutual of client and server in audio data transmission; Greatly reduce the error rate of transfer of data, reduced network delay, guaranteed the real-time of audio data transmission.
The embodiment of the invention three provides a kind of client, and referring to Fig. 4, said client comprises transmission initiation unit 41, uninterrupted transmitting element 42 and end of transmission unit 43,
Said uninterrupted transmitting element 42; Be used for server begins request and is ready to receive voice data according to said audio transmission after, adopting uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data, wherein; Under said uninterrupted mode; Client is not waited for from the replying of server after having sent a packets of audio data, is directly carried out the transmission of next packets of audio data;
Said end of transmission unit 43 is used for after the packets of audio data of said voice data all is sent to server, sends the audio transmission ending request to server.
Further, comprise packet index and packet main body in said each said packets of audio data, said packet index is used for the sending order of identification audio packet and this packets of audio data, and this packet main body is used to carry the voice data of needs transmission.
The embodiment of the invention also provides a kind of server, and referring to Fig. 4, said server comprises uninterrupted receiving element 44; Be used for after the audio transmission according to client begins to ask to be ready to receive voice data, the packets of audio data of the voice data that the uninterrupted mode of reception customer end adopted is packet-by-packet sent, wherein; Under said uninterrupted mode; Client is not waited for from the replying of server after having sent a packets of audio data, is directly carried out the transmission of next packets of audio data; And, after client finishes the whole transmissions of the packets of audio data of said voice data, receive the audio transmission ending request that client is sent.
Further, the overall budget number of the packets of audio data that said audio transmission ending request indication client is transmitted comprises the packet index in each said packets of audio data,
Said server also comprises transmission feedback unit 45, is used for after the audio transmission ending request that receives the client transmission, judging whether successfully to receive all audio frequency packet according to the overall budget number in the said audio transmission ending request; If; Send successful respond to client, finish the transmission of current voice data, if not; Send failure to client and reply, comprise the not packet index of the packets of audio data of success reception during said failure is replied.
The concrete working method of each unit can be referring to method embodiment of the present invention in the client and server in the embodiment of the invention.
From the above mentioned, the embodiment of the invention has reduced mutual cost through optimizing the interaction flow of client-server end bi-directional data; Can guarantee audio transmission sooner, more timely, and the two-way interactive number of times reduces; Also reduced owing to the Network Transmission condition, and the probability of the bust this that causes.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. the transmission method of a voice data is characterized in that, said method comprises:
User end to server sends audio transmission and begins request;
After server begins according to said audio transmission to ask to be ready to receive voice data; Client adopts uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data; Wherein, under said uninterrupted mode, client is after having sent a packets of audio data; Do not wait for from the replying of server, directly carry out the transmission of next packets of audio data;
After the packets of audio data of said voice data all was sent to server, user end to server sent the audio transmission ending request.
2. method according to claim 1 is characterized in that, comprises packet index and packet main body in each said packets of audio data, and said packet index is used for the sending order of identification audio packet and this packets of audio data.
3. method according to claim 2 is characterized in that, the overall budget number of the packets of audio data that said audio transmission ending request indication client is transmitted,
After user end to server sent the audio transmission ending request, said method also comprised:
Server judges whether successfully to receive all audio frequency packet according to the overall budget number in the said audio transmission ending request; If; Send successful respond to client, finish the transmission of current voice data, if not; Send failure to client and reply, comprise the not packet index of the packets of audio data of success reception during said failure is replied;
Client is receiving failure when replying, and retransmits the packet index indicated packets of audio data of failure in replying.
4. method according to claim 2 is characterized in that,
Said audio transmission begins to ask to indicate the size of audio data format waiting for transmission, sample rate and each packets of audio data.
5. according to each described method of claim 2 to 4, it is characterized in that said method also comprises:
Server whenever receives a packets of audio data, this packets of audio data is stored in the corresponding region of buffer memory according to the packet index of this packets of audio data;
When the memory data output in the buffer memory reached predetermined value, server write database with the data in the buffer memory, emptied the buffer memory and the packets of audio data that will newly receive and was stored in the buffer memory after emptying.
6. method according to claim 5 is characterized in that, said packet index according to this packets of audio data is stored in this packets of audio data in the corresponding region of buffer memory and comprises:
Packet index according to first packets of audio data is stored in first packets of audio data in the first area of buffer memory;
When the packet index indication that receives second packets of audio data and second packets of audio data is stored to said first area with second packets of audio data, directly deletes first packets of audio data of having stored in the said first area and second packets of audio data is stored to the first area.
7. a client is characterized in that, said client comprises transmission initiation unit, uninterrupted transmitting element and end of transmission unit,
The unit is initiated in said transmission, is used for sending audio transmission to server and begins request;
Said uninterrupted transmitting element; Be used for server begins request and is ready to receive voice data according to said audio transmission after, adopting uninterrupted mode packet-by-packet to be sent to server the packets of audio data of said voice data, wherein; Under said uninterrupted mode; Client is not waited for from the replying of server after having sent a packets of audio data, is directly carried out the transmission of next packets of audio data;
Said end of transmission unit is used for after the packets of audio data of said voice data all is sent to server, sends the audio transmission ending request to server.
8. client according to claim 7 is characterized in that, comprises packet index and packet main body in said each said packets of audio data, and said packet index is used for the sending order of identification audio packet and this packets of audio data.
9. a server is characterized in that, said server comprises uninterrupted receiving element,
Said uninterrupted receiving element; Be used for after the audio transmission according to client begins to ask to be ready to receive voice data, the packets of audio data of the voice data that the uninterrupted mode of reception customer end adopted is packet-by-packet sent, wherein; Under said uninterrupted mode; Client is not waited for from the replying of server after having sent a packets of audio data, is directly carried out the transmission of next packets of audio data; And, after client finishes the whole transmissions of the packets of audio data of said voice data, receive the audio transmission ending request that client is sent.
10. server according to claim 9 is characterized in that, the overall budget number of the packets of audio data that said audio transmission ending request indication client is transmitted comprises the packet index in each said packets of audio data,
Said server also comprises the transmission feedback unit, is used for after the audio transmission ending request that receives the client transmission, judging whether successfully to receive all audio frequency packet according to the overall budget number in the said audio transmission ending request; If; Send successful respond to client, finish the transmission of current voice data, if not; Send failure to client and reply, comprise the not packet index of the packets of audio data of success reception during said failure is replied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163296.XA CN102685143B (en) | 2012-05-23 | 2012-05-23 | Audio data transmission method, client side and server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163296.XA CN102685143B (en) | 2012-05-23 | 2012-05-23 | Audio data transmission method, client side and server |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102685143A true CN102685143A (en) | 2012-09-19 |
| CN102685143B CN102685143B (en) | 2015-02-04 |
Family
ID=46816506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210163296.XA Active CN102685143B (en) | 2012-05-23 | 2012-05-23 | Audio data transmission method, client side and server |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102685143B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106302437A (en) * | 2016-08-11 | 2017-01-04 | 北京云知声信息技术有限公司 | Method of speech processing and device |
| CN106656434A (en) * | 2015-08-18 | 2017-05-10 | Gn瑞声达A/S | Method of exchanging data packages between first and second portable communication devices |
| CN108965426A (en) * | 2018-07-11 | 2018-12-07 | 深圳市东微智能科技股份有限公司 | Data processing method, device, computer equipment and the storage medium of audio system |
| CN111371792A (en) * | 2020-03-06 | 2020-07-03 | 杭州涂鸦信息技术有限公司 | Method and system for reporting pickup data based on intelligent audio equipment |
| CN112788078A (en) * | 2019-11-07 | 2021-05-11 | 上海哔哩哔哩科技有限公司 | Data transmission method, receiving device, sending device and computer equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741531A (en) * | 2005-09-07 | 2006-03-01 | 北京中星微电子有限公司 | A method for transmitting audio-data via UDP network |
| CN101944982A (en) * | 2010-08-11 | 2011-01-12 | 南昌市恒鑫电子技术有限公司 | Real-time stream media transmitting method based on time-driven sliding window protocol |
| CN101945427A (en) * | 2009-07-03 | 2011-01-12 | 深圳市融创天下科技发展有限公司 | Efficient streaming media transmission method |
-
2012
- 2012-05-23 CN CN201210163296.XA patent/CN102685143B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741531A (en) * | 2005-09-07 | 2006-03-01 | 北京中星微电子有限公司 | A method for transmitting audio-data via UDP network |
| CN101945427A (en) * | 2009-07-03 | 2011-01-12 | 深圳市融创天下科技发展有限公司 | Efficient streaming media transmission method |
| CN101944982A (en) * | 2010-08-11 | 2011-01-12 | 南昌市恒鑫电子技术有限公司 | Real-time stream media transmitting method based on time-driven sliding window protocol |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656434A (en) * | 2015-08-18 | 2017-05-10 | Gn瑞声达A/S | Method of exchanging data packages between first and second portable communication devices |
| CN106302437A (en) * | 2016-08-11 | 2017-01-04 | 北京云知声信息技术有限公司 | Method of speech processing and device |
| CN108965426A (en) * | 2018-07-11 | 2018-12-07 | 深圳市东微智能科技股份有限公司 | Data processing method, device, computer equipment and the storage medium of audio system |
| CN112788078A (en) * | 2019-11-07 | 2021-05-11 | 上海哔哩哔哩科技有限公司 | Data transmission method, receiving device, sending device and computer equipment |
| CN112788078B (en) * | 2019-11-07 | 2023-03-24 | 上海哔哩哔哩科技有限公司 | Data transmission method, receiving device, sending device and computer equipment |
| CN111371792A (en) * | 2020-03-06 | 2020-07-03 | 杭州涂鸦信息技术有限公司 | Method and system for reporting pickup data based on intelligent audio equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102685143B (en) | 2015-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101711386B (en) | Synchronizing email messages between an external and/or local email server and/or a wireless device | |
| CN102685143A (en) | Audio data transmission method, client side and server | |
| CN103024053A (en) | Cloud storage method, resource scheduling system and cloud storage node and system | |
| CN107403298A (en) | A kind of barcode scanning based on wechat posts part method and system | |
| CN103581230A (en) | File transmission system and method, receiving end and sending end | |
| CN102710548A (en) | Method and system for tracking operation of each email receiver over email | |
| CN102542018A (en) | Web online file viewing system and file conversion device | |
| CN101073237B (en) | Method for delivering multimedia files | |
| CN104331974A (en) | Bluetooth number-taking method and system | |
| CN101699482A (en) | Method for realizing data exchange among service systems by using storage and logistics center model | |
| KR20170007691A (en) | Methods for receiving response information in M2M system and Apparatuses thereof | |
| CN103384181A (en) | Data packet transmission method and device | |
| KR101809365B1 (en) | Message Fragmentation Method using a MQTT Protocol in M2M/IoT Platforms | |
| CN101557415A (en) | Method supporting web page switching for uploading a plurality of documents to web browser | |
| CN101222344B (en) | File multicasting transmission method and system | |
| CN104065465A (en) | Message retransmitting method, request end, response end and system | |
| CN103988468A (en) | Apparatus and method for inviting subscription to contact information | |
| CN103220343B (en) | Big data multi-system retransmission method | |
| CN102118709B (en) | Method and system for increasing format conversion efficiency in group multimedia message sending service | |
| CN101841477B (en) | Method for improving reliable message transmission credit of network control chip | |
| CN100576787C (en) | A kind of method of between maintenance terminal and background devices, carrying out the transmission of big data quantity safety | |
| CN102595335A (en) | Processing method and system of sending file or folder to multiple persons | |
| CN112328560A (en) | File scheduling method and system | |
| CN101094193A (en) | Method and system of processing multi-sort delivery requirements from multiple sources | |
| CN204204033U (en) | Based on the e-commerce system of wireless network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 810, 8 / F, 34 Haidian Street, Haidian District, Beijing 100080 Patentee after: BEIJING D-MEDIA COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 100089 Beijing city Haidian District wanquanzhuang Road No. 28 Wanliu new building 6 storey block A room 602 Patentee before: BEIJING D-MEDIA COMMUNICATION TECHNOLOGY Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |