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Multimedia data sending method and device based on coaxial cable

A technology for multimedia data and multimedia data flow, applied in the field of data transmission, can solve problems such as increasing costs, and achieve the effect of reducing costs

Active Publication Date: 2019-08-23
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the existing traditional monitoring environment, the network cable needs to be replaced, which increases the cost

Method used

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  • Multimedia data sending method and device based on coaxial cable
  • Multimedia data sending method and device based on coaxial cable
  • Multimedia data sending method and device based on coaxial cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Step S110: receiving the multimedia data stream; performing data format conversion on the multimedia data stream to obtain a first data stream.

[0093] Wherein, when the multimedia data stream is received, 10-bit video data, 32-bit audio data, 1-bit line synchronization signal and 1-bit field synchronization signal included in the multimedia data stream are obtained.

[0094] The 10-bit video data, 1-bit line synchronization signal, 1-bit field synchronization signal and 1 extension bit are used to complement the extension bit with 0 to form a 13-bit first data packet, as shown in Table 1, where Din[9:0 ] indicates 10-bit video data. The extension bit is used for subsequent data packet merging / splicing to perform data interval. One or more bits can be set for the extension bit as required, and the value of the extension bit can also be customized.

[0095] Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Din[9...

Embodiment 2

[0124] Step S110: receiving the multimedia data stream; performing data format conversion on the multimedia data stream to obtain a first data stream.

[0125] Wherein, when the multimedia data stream is received, 12-bit video data, 32-bit audio data, 1-bit line synchronization signal and 1-bit field synchronization signal contained in the multimedia data stream are obtained.

[0126] The 12-bit video data, 1-bit line synchronization signal, 1-bit field synchronization signal and 1 extension bit are complemented with 0 to form the first data packet of 15 bits, as shown in Table 4, where Din[11:0 ] indicates 12-bit video data. The extension bit is used for subsequent data packet merging / splicing to perform data interval. One or more bits can be set for the extension bit as required, and the value of the extension bit can also be customized.

[0127]

[0128] Table 4 15-bit first data packet

[0129] Step S120: using the first data packet in the first data stream for cycli...

Embodiment 3

[0156] Step S110: receiving the multimedia data stream; performing data format conversion on the multimedia data stream to obtain a first data stream.

[0157] Wherein, when the multimedia data stream is received, 16-bit video data, 32-bit audio data, 1-bit line synchronization signal and 1-bit field synchronization signal contained in the multimedia data stream are obtained.

[0158] The 16-bit video data, 1-bit line synchronization signal, 1-bit field synchronization signal and 1 extension bit are complemented with 0 to form the first data packet of 19 bits, as shown in Table 7, wherein Din[15:0 ] indicates 16-bit video data. The extension bit is used for subsequent data packet merging / splicing to perform data interval. One or more bits can be set for the extension bit as required, and the value of the extension bit can also be customized.

[0159]

[0160] Table 7 19-bit first data packet

[0161] Step S120: using the first data packet in the first data stream for cyc...

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Abstract

The invention discloses a multimedia data sending method based on a coaxial cable. The method comprises the following steps: receiving a multimedia data stream; performing data format conversion on the multimedia data stream to obtain a first data stream; sequentially using the first data packet in the first data stream for cyclic redundancy CRC calculation, and outputting a CRC code according toa predetermined rule; inserting the CRC code into the first data stream to form a second data stream; generating a time base reference TRS sequence according to a preset protocol; inserting the TRS sequence into the second data stream to form a third data stream; mapping the third data stream into a fourth data stream; and converting each fourth data packet in the fourth data stream into 1-bit serial data. The sending device based on the method comprises a data receiving and format conversion unit, a CRC calculation and insertion unit, a bit mapping unit and a conversion unit. According to themethod and the device, the original video data stream and audio data are converted into serial data, and the high-definition video and audio data are sent through the coaxial cable, so that the costis greatly reduced.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a coaxial cable-based multimedia data sending method and device. Background technique [0002] At present, as China's video surveillance market is stimulated and driven by factors such as safe city construction and other security projects and the rapid growth of video surveillance demand in various industries, it has achieved extraordinary rapid development, and the overall market scale has expanded rapidly. Due to its low image definition, the analog monitoring system can no longer meet the security requirements. However, the adoption of a fully digital monitoring system will bring a large cost of network cable deployment, especially for the renovation of monitoring systems in old residential areas and factories. [0003] With the wide application of video surveillance, the demand for digitalization is getting higher and higher, showing the trend of replacing traditional analog...

Claims

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Application Information

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IPC IPC(8): H04N7/10H04N7/18H04N5/04
CPCH04N5/04H04N7/10H04N7/18
Inventor 瞿军武施彦薛骏
Owner WUXI ZGMICRO ELECTRONICS CO LTD