CN101193284A - Validation method, system and device for transmission integrity of compressed file - Google Patents
Validation method, system and device for transmission integrity of compressed file Download PDFInfo
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- CN101193284A CN101193284A CNA2007103044355A CN200710304435A CN101193284A CN 101193284 A CN101193284 A CN 101193284A CN A2007103044355 A CNA2007103044355 A CN A2007103044355A CN 200710304435 A CN200710304435 A CN 200710304435A CN 101193284 A CN101193284 A CN 101193284A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 54
- 238000010200 validation analysis Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000012795 verification Methods 0.000 claims description 24
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a method for verifying the integrity of transmission of compressed files. The method comprises: a host end receives a compressed file sent from a device end in the form of a data packet and the total number of the data packet contained in the compressed file sent from the device port. When receiving of the compressed file is finished, whether the number of received data packet is equal to the total number of the data packet in the compressed file from the device port is judged. If the number of received data packet is equal to the total number of the data packet in the compressed file from the device port, transmission of the compressed file is judged to be integrity; and otherwise, transmission of the compressed file is judged to be not integrity. The invention also discloses a system, the host end and the device end for verifying the integrity of transmission of the compressed file. By adopting the technical proposal disclosed by the embodiment of the invention, the rate for verifying the integrity of transmission of the compressed file can be increased.
Description
Technical field
The present invention relates to field of data transmission, relate in particular to a kind of transmission integrity of compressed file verification method, system and device.
Background technology
JPEG (joint photographic experts group) (Joint Photographic Experts Group, JPEG) be a kind of application Image Compression very widely, use the jpeg image compress technique image is compressed resulting JPEG compressed file, the kind of the color that its file size and described image are comprised and the factors such as complexity of this image are relevant, might not be identical at the length of the different resulting JPEG compressed files of image applications JPEG compress technique.
The JPEG compressed file is made up of eight parts, and table one has provided the structure of JPEG compressed file.
| The JPEG compressed file | Explain |
| 0xFF 0xD8…… | Image begin (Start of Image, SOI) |
| 0xFF 0xE0…… | APPO mark (Marker) |
| 0xFF 0xE1～0xEF…… | APPn mark (Markers) |
| 0xFF 0xDB …… | Quantization table (Difine Quantization Table, DQT) |
| 0xFF 0xC0…… | Two field picture begin (Start of Frame, SOF) |
| 0xFF 0xC4…… | Huffman table (Difine Huffman Table, DHT) |
| 0xFF 0xDA…… | The scanning beginning (Start of Scan, SOS) |
| 0xFF 0xD9…… | The image end (End of Image, EOI) |
By table one as seen, each part of JPEG compressed file all comprises two start mark bytes, and its first byte is fixed as 16 systems and counts 0xFF, and second byte is used to distinguish above-mentioned eight parts.
When USB PC camera (USB PC Camera) is sent to host side with the imagery exploitation USB interface of its storage inside, in order to save the USB transmission bandwidth, usually earlier image is carried out the JPEG compression and obtain the JPEG compressed file, and then this JPEG compressed file is divided into a plurality of packets is sent to host side.Host side can be carried out the file integrality checking to this JPEG compressed file after receiving this JPEG compressed file, to judge the JPEG compressed file whether data-bag lost is arranged in transmission course.
Host side to the concrete grammar that the JPEG compressed file carries out the transmission integrity checking is: host side decompresses to the JPEG compressed file that receives, the length of original entrained in the length of the file after decompressing and the JPEG compressed file is compared, if above-mentioned two kinds of length are identical, show that then the JPEG compressed file does not have lost data packets in the process of transmission, the received JPEG compressed file of host side is complete, otherwise shows that the received JPEG compressed file of host side is imperfect.
By such scheme as seen, when host side verifies that its received JPEG compressed file is whether complete, need decompress to the JPEG compressed file, thus host side to carry out the speed of JPEG transmission integrity of compressed file checking lower.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of transmission integrity of compressed file verification method, system and host side and equipment end, to improve the speed of transmission integrity of compressed file checking.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of transmission integrity of compressed file verification method, this method comprises:
The compressed file that host side receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, when compressed file receives, whether the number of judging the packet receive equals the packet sum that compressed file that described equipment end sends comprises, if judge that the compressed file transmission is complete; Otherwise, judge that the compressed file transmission is imperfect.
A kind of transmission integrity of compressed file verification system, this system comprises equipment end and host side;
Equipment end is used for, and sends compressed file with data packet form to host side, sends the packet sum that this compressed file comprises to host side;
Host side is used for, the compressed file that the receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, when compressed file receives, whether the number of judging the packet receive equals the packet sum that compressed file that described equipment end sends comprises, if judge that the compressed file transmission is complete, otherwise, judge that the compressed file transmission is imperfect.
A kind of host side, this host side comprises: packet receiving element, number of data packets statistic unit and compressed file integrity verification unit;
Described packet receiving element is used for, the compressed file that the receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, this packet is sent to the number of data packets statistic unit, this packet sum is sent to compressed file integrity verification unit;
Described number of data packets statistic unit is used for, and writes down the number of its received packet, when when compressed file receives, the number of the packet that receives of record is sent to compressed file integrity verification unit; Described compressed file integrity verification unit is used for, whether the number of data packets that judgment data bag number statistical unit is sent equals the packet sum that compressed file that the packet receiving element sends comprises, if judge that the compressed file transmission is complete, otherwise, judge that the compressed file transmission is imperfect.
A kind of equipment end, described equipment end comprise number of data packets statistic unit and packet transmitting element;
Described number of data packets statistic unit is used for, and will send to the packet transmitting element from the packet that the JPEG compressed file is partitioned into, and adds up the packet sum that this JPEG compressed file comprises, and this packet sum is sent to the packet transmitting element;
Described packet transmitting element is used for, and sends the packet sum that described packet and JPEG compressed file comprise.
As seen from the above technical solution, the present invention only needs host side to add up the number of its transmission that receives from the compressed file packet of equipment end, relatively whether the compressed file packet sum sent of this number and equipment end is identical, if, judge that then the compressed file transmission is complete, otherwise judge that the compressed file transmission is imperfect, do not need host side that the compressed file that it receives is decompressed, therefore improved the speed of transmission integrity of compressed file checking.
Description of drawings
Fig. 1 is the flow chart of equipment end in the method for the JPEG transmission integrity of compressed file checking that provides of the embodiment of the invention;
Fig. 2 is the flow chart of host side in the method for the JPEG transmission integrity of compressed file checking that provides of the embodiment of the invention;
Fig. 3 is the structure chart of the JPEG transmission integrity of compressed file verification system that provides of the embodiment of the invention;
Fig. 4 is the structure chart of the host side that provides of the embodiment of the invention;
Fig. 5 is the structure chart of the equipment end that provides of the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
In the embodiment of the invention, be verified as example, introduce the concrete grammar that carries out the compressed file integrity verification with the JPEG transmission integrity of compressed file.
In the embodiment of the invention, equipment end refers to the equipment that stores JPEG compressed file to be sent, such as USB PC Camera.
Fig. 1 is the flow chart of equipment end in the method for the JPEG transmission integrity of compressed file checking that present embodiment provided, and as shown in Figure 1, the flow chart of equipment end specifically comprises the steps:
Comprised host side in this USB ISO request and need the information of the size of the packet that the slave unit end obtained in this data transmission procedure, equipment end is partitioned into packet etc. according to this information from the JPEG compressed file to be sent.
Equipment end can judge whether this packet is the initial data bag of JPEG compressed file according to the design feature of JPEG compressed file, for example, usually preceding 16 bits of JPEG compressed file are that 16 systems are counted FFD8, therefore, if it is that 16 systems are counted FFD8 that equipment end detects preceding 16 bits of this packet, can judge that so this packet is the initial data bag of JPEG compressed file, otherwise can judge that this packet is not the initial data bag of JPEG compressed file.
Equipment end can judge whether this packet is the end data packet of JPEG compressed file according to the design feature of JPEG compressed file, for example, usually last 16 bits of JPEG compressed file are that 16 systems are counted FFD9, therefore, if it is that 16 systems are counted FFD9 that equipment end detects last 16 bits of this packet, can judge that so this packet is the end data packet of JPEG compressed file, otherwise can judge that this packet is not a JPEG compressed file end data packet.
According to the design feature of JPEG compressed file, this packet number can be placed on ending place of JPEG compressed file, promptly be placed on the back of the end mark byte FFD9 of JPEG compressed file.
Corresponding with equipment end flow chart shown in Figure 1, Fig. 2 as shown in Figure 2, specifically comprises the steps: for the flow chart of host side in the method for the JPEG transmission integrity of compressed file checking that present embodiment provided
Step 201, host side sends USB ISO transmission request to equipment end.
Step 202, the packet that host side receiving equipment end sends over judges whether this packet is the initial data bag of JPEG compressed file, if then execution in step 203, otherwise execution in step 204.
Host side can adopt the method that equipment end adopted in the step 102 to judge whether this packet is the initial data bag of JPEG compressed file.
Step 203, host side is initialized as 1 with the packet number of its record, goes to step 205.
Step 204, host side adds 1 with the packet number of its record.
Step 205, host side judge whether this packet is the end data packet of JPEG compressed file, if execution in step 206 then, otherwise execution in step 201.
Host side can adopt the method that equipment end adopts in the step 105 to judge whether this packet is the end data packet of JPEG compressed file.
Step 206, whether packet number entrained in the packet number of himself record of host side checking and this packet is identical, if host side judges that its received JPEG compressed file is complete, otherwise host side judges that its received JPEG compressed file is imperfect.
Fig. 3 is the structure chart of the JPEG transmission integrity of compressed file verification system that present embodiment provided, and as shown in Figure 3, this system comprises equipment end 301 and host side 302.
Equipment end 301 is used for, and sends the JPEG compressed file with data packet form to host side, sends the packet sum that this JPEG compressed file comprises to host side.
Host side 302 is used for, the JPEG compressed file that receiving equipment end 301 is sent with data packet form, the packet sum that this JPEG compressed file that receiving equipment end 301 is sent comprises, when the JPEG compressed file receives, whether the number of judging the packet receive equals the packet sum that JPEG compressed file that described equipment end sends comprises, if judge that the transmission of JPEG compressed file is complete; Otherwise, judge that the transmission of JPEG compressed file is imperfect.
Fig. 4 is the structure chart of the host side that present embodiment provided, and as shown in Figure 4, this host side comprises packet receiving element 401, number of data packets statistic unit 402 and compressed file integrity verification unit 403.
Number of data packets statistic unit 402 is used for, and writes down the number of its received packet, when when the JPEG compressed file receives, the number of the packet that receives of record is sent to jpeg file integrity verification unit 403.
Compressed file integrity verification unit 403 is used for, whether the number of data packets that judgment data bag number statistical unit 402 is sent equals the packet sum that JPEG compressed file that packet receiving element 401 sends comprises, if, judge that the transmission of JPEG compressed file is complete, otherwise, judge that the transmission of JPEG compressed file is imperfect.
This host side can further include packet size information transmitting element.
Packet size information transmitting element is used for, send the packet size information to equipment end, so that equipment end whenever receives the packet size information one time, from the JPEG compressed file, be partitioned into a packet according to this information, and this JPEG compressed file is being cut apart when finishing the packet sum that the sum of the packet that will be partitioned into comprises as this JPEG compressed file from this JPEG compressed file.
Number of data packets statistic unit 402 comprises determination module 4021 and number statistical module 4022.
Number statistical module 4022 is used for, and the number of the packet that recorder is arrived receives when notice when receiving described JPEG compressed file, and the number of the packet that receives of record is sent to jpeg file integrity verification unit 403.
Fig. 5 is the structure chart of the equipment end that present embodiment provided, and as shown in Figure 5, this equipment end comprises number of data packets statistic unit 501 and packet transmitting element 502.
Number of data packets statistic unit 501 is used for, and will send to packet transmitting element 502 from the packet that the JPEG compressed file is partitioned into, and adds up the packet sum that this JPEG compressed file comprises, and this packet sum is sent to packet transmitting element 502.
This equipment end can further include packet cutting unit 503.
Number of data packets statistic unit 501 comprises number of data packets statistical module 5011 and number of data packets package module 5012.
Number of data packets statistical module 5011 is used for, when the packet that is partitioned into from the JPEG compressed file is not end data packet, this packet is directly sent to packet transmitting element 502, when the packet that is partitioned into from the JPEG compressed file was end data packet, the packet sum that this JPEG compressed file that this packet and statistics are obtained comprises sent to data number package module 5012.
Number of data packets package module 5012 is used for, and the packet sum that described JPEG compressed file is comprised is encapsulated in the end data packet of described JPEG compressed file.Concrete, number of data packets package module 5012 is used for described packet sum is encapsulated in after the end mark byte FFD9 of described JPEG compressed file.
As seen from the above technical solution, the embodiment of the invention only needs host side to add up the number of its transmission that receives from the JPEG of equipment end compressed file packet, relatively whether the JPEG compressed file packet sum sent of this number and equipment end is identical, if, judge that then the transmission of JPEG compressed file is complete, otherwise judge that the transmission of JPEG compressed file is imperfect, do not need host side that the JPEG compressed file that it receives is decompressed, therefore improved the speed of JPEG transmission integrity of compressed file checking.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a transmission integrity of compressed file verification method is characterized in that, this method comprises:
The compressed file that host side receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, when compressed file receives, whether the number of judging the packet receive equals the packet sum that compressed file that described equipment end sends comprises, if judge that the compressed file transmission is complete; Otherwise, judge that the compressed file transmission is imperfect.
2. the method for claim 1 is characterized in that, the compressed file that described host side receiving equipment end is sent with data packet form further comprises before:
Host side sends packet size information current to be received to equipment end, so that equipment end whenever receives the packet size information one time, from compressed file, be partitioned into a packet according to this information, and this compressed file is being cut apart when finishing the packet sum that the sum of the packet that will be partitioned into comprises as described compressed file from this compressed file.
3. the method for claim 1 is characterized in that, the packet sum that this compressed file that described equipment end is sent comprises is arranged on after the end mark byte of this compressed file that this equipment end sends.
4. the method for claim 1 is characterized in that, the compressed file that described host side receiving equipment end is sent with data packet form comprises:
The packet that A, host side receiving equipment end are sent judges whether this packet is the initial data bag of compressed file, if, recorder to number of data packets be 1, go to step B; Otherwise, the number of the packet that receives of record is added 1, go to step B;
Whether B, judgment data bag are the end data packet of compressed file, if compressed file receives, otherwise go to steps A.
5. method as claimed in claim 4 is characterized in that, whether described judgment data bag is that the initial data bag of compressed file comprises:
Judge whether this packet comprises compressed file beginning flag byte, if judge that this packet is the initial data bag of compressed file; Otherwise, judge that this packet is not the initial data bag of compressed file.
6. method as claimed in claim 4 is characterized in that, whether described judgment data bag is that the end data packet of compressed file comprises:
Judge whether this packet comprises compressed file end mark byte, if, judge that this packet is the end data packet of compressed file, otherwise, judge that this packet is not the end data packet of compressed file.
7. as the described method of the arbitrary claim of claim 1 to 6, it is characterized in that described compressed file is a JPEG (joint photographic experts group) JPEG compressed file.
8. a transmission integrity of compressed file verification system is characterized in that, this system comprises equipment end and host side;
Equipment end is used for, and sends compressed file with data packet form to host side, sends the packet sum that this compressed file comprises to host side;
Host side is used for, the compressed file that the receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, when compressed file receives, whether the number of judging the packet receive equals the packet sum that compressed file that described equipment end sends comprises, if judge that the compressed file transmission is complete, otherwise, judge that the compressed file transmission is imperfect.
9. system as claimed in claim 8 is characterized in that, described compressed file is the JPEG compressed file.
10. a host side is characterized in that, this host side comprises: packet receiving element, number of data packets statistic unit and compressed file integrity verification unit;
Described packet receiving element is used for, the compressed file that the receiving equipment end is sent with data packet form, the packet sum that this compressed file that the receiving equipment end is sent comprises, this packet is sent to the number of data packets statistic unit, this packet sum is sent to compressed file integrity verification unit;
Described number of data packets statistic unit is used for, and writes down the number of its received packet, when when compressed file receives, the number of the packet that receives of record is sent to compressed file integrity verification unit;
Described compressed file integrity verification unit is used for, whether the number of data packets that judgment data bag number statistical unit is sent equals the packet sum that compressed file that the packet receiving element sends comprises, if judge that the compressed file transmission is complete, otherwise, judge that the compressed file transmission is imperfect.
11. host side as claimed in claim 10 is characterized in that, described host side further comprises packet size information transmitting element;
Described packet size information transmitting element is used for, send the packet size information to equipment end, so that equipment end whenever receives the packet size information one time, from compressed file, be partitioned into a packet according to this information, and this compressed file is being cut apart when finishing the packet sum that the sum of the packet that will be partitioned into comprises as this compressed file from this compressed file.
12. host side as claimed in claim 10 is characterized in that, described number of data packets statistic unit comprises determination module and number statistical module;
Described determination module is used for, judge whether its received packet is the initial data bag of compressed file, if, number-of-packet in the number statistical module is initialized as 1, otherwise, the number-of-packet in the number statistical module is increased 1, judge whether its received packet is the end data packet of compressed file, if send compressed file to the number statistical module and receive notice;
Described number statistical module is used for, and the number of the packet that recorder is arrived receives when notice when receiving described compressed file, and the number of the packet that receives of record is sent to compressed file integrity verification unit.
13., it is characterized in that described compressed file is the JPEG compressed file as the described host side of the arbitrary claim of claim 10 to 12.
14. an equipment end is characterized in that, described equipment end comprises number of data packets statistic unit and packet transmitting element;
Described number of data packets statistic unit is used for, and will send to the packet transmitting element from the packet that the JPEG compressed file is partitioned into, and adds up the packet sum that this JPEG compressed file comprises, and this packet sum is sent to the packet transmitting element;
Described packet transmitting element is used for, and sends the packet sum that described packet and JPEG compressed file comprise.
15. equipment end as claimed in claim 14 is characterized in that, described equipment end further comprises the packet cutting unit;
Described packet cutting unit is used for, and receives the packet size information that host side is sent, and is partitioned into a packet according to this information from the JPEG compressed file, and this packet is sent to the number of data packets statistic unit.
16. equipment end as claimed in claim 14 is characterized in that, described number of data packets statistic unit comprises number of data packets statistical module and number of data packets package module;
Described number of data packets statistical module is used for, when the packet that is partitioned into from the JPEG compressed file is not end data packet, this packet is directly sent to the packet transmitting element, when the packet that is partitioned into from the JPEG compressed file was end data packet, the packet sum that this JPEG compressed file that this packet and statistics are obtained comprises sent to data number package module;
The number of data packets package module is used for, and the packet sum that described JPEG compressed file is comprised is encapsulated in the end data packet of described JPEG compressed file.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103044355A CN101193284B (en) | 2007-12-27 | 2007-12-27 | Validation method, system and device for transmission integrity of compressed file |
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| CN2007103044355A CN101193284B (en) | 2007-12-27 | 2007-12-27 | Validation method, system and device for transmission integrity of compressed file |
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| CN101193284B CN101193284B (en) | 2010-07-07 |
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| CN109104481A (en) * | 2018-08-07 | 2018-12-28 | Oppo（重庆）智能科技有限公司 | file integrity detection method, file integrity detection device and terminal device |
| CN109270885A (en) * | 2018-10-26 | 2019-01-25 | 苏州华兴源创科技股份有限公司 | Monitor data communications method, device, equipment and the storage medium of PLC system |
| CN109270885B (en) * | 2018-10-26 | 2021-01-01 | 苏州华兴源创科技股份有限公司 | Data communication method, device and equipment for monitoring PLC system and storage medium |
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| CN101193284B (en) | 2010-07-07 |
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