阅读说明：本技术 一种高清行车记录仪与fm同时工作时的抗干扰方法及装置 (Anti-interference method and device for simultaneous working of high-definition automobile data recorder and FM (frequency modulation) ) 是由 刘铁堂 黄仁杉 张晓旭 王超芹 张仁华 于 2019-09-27 设计创作，主要内容包括：发明公开了一种高清行车记录仪与FM同时工作时的抗干扰方法,需提供摄像模块、SD卡、USB端口、主控芯片、图像处理芯片、电源管理芯片,高清行车记录仪开始工作,摄像模块录制行车影像,通过主控芯片将摄像模块录制的1080P高清影像进行分析并做编码处理,把编码处理后的行车影像输入到图像处理芯片进行重新编码处理,调用电源管理芯片,将重新编码处理后的影像数据通过高速USB端口分段写入SD卡中。本发明还提供一种高清行车记录仪与FM同时工作时的抗干扰装置,通过分割影像数据并压缩,使用USB端口传输数据存储到SD卡中,使高清行车记录仪储存环节产生的电磁干扰与FM广播频率(87MHZ-108MHZ)不在同一频率工作,而达到消除高清行车记录仪对收音机干扰的问题。(the invention discloses an anti-interference method when a high-definition automobile data recorder and an FM (frequency modulation) simultaneously work, which is characterized in that a camera module, an SD (secure digital) card, a USB (universal serial bus) port, a main control chip, an image processing chip and a power management chip are required to be provided, the high-definition automobile data recorder starts to work, the camera module records automobile images, the 1080P high-definition images recorded by the camera module are analyzed and coded by the main control chip, the coded automobile images are input into the image processing chip for recoding, the power management chip is called, and image data subjected to recoding are written into the SD card in a segmented mode through the high-speed USB port. The invention also provides an anti-jamming device when the high-definition automobile data recorder and the FM work simultaneously, which is used for transmitting data to be stored in the SD card by dividing and compressing image data and using the USB port, so that the electromagnetic interference generated in the storage link of the high-definition automobile data recorder and the FM broadcast frequency (87MHZ-108MHZ) do not work at the same frequency, and the problem of interference of the high-definition automobile data recorder on a radio is solved.)

1. An anti-interference method for simultaneous working of a high-definition automobile data recorder and an FM (frequency modulation) is characterized in that a camera module, an SD (secure digital) card, a USB (universal serial bus) port, a main control chip, an image processing chip and a power management chip are required to be provided, and the method comprises the following steps:

S1, the high-definition automobile data recorder starts to work, and the camera module records automobile images;

s2, analyzing the 1080P high-definition image recorded by the camera module through the main control chip and coding the image;

s3, inputting the driving image after the coding processing into an image processing chip for recoding processing;

And S4, calling a power management chip, controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port.

2. The method for resisting interference when the high-definition automobile data recorder and the FM work simultaneously as claimed in claim 1, wherein the step of encoding processing comprises;

Converting the original YUV format into an H.264 format;

dividing the image into one section every 60 seconds;

the segments are renamed chronologically.

3. the method for resisting interference when the high-definition automobile data recorder and the FM work simultaneously as claimed in claim 1, wherein the step of recoding comprises;

Converting the H.264 format into an mp4 format;

the volume of each image segment is compressed.

4. The utility model provides an anti jamming unit of high definition vehicle event data recorder and FM simultaneous working which characterized in that: the intelligent image acquisition system comprises a camera module, an SD card, a USB port, a main control chip, an image processing chip and a power management chip, wherein the output end of the camera module is connected with the input end of the main control chip, the output end of the main control chip is respectively connected with the image processing chip and the power management chip, and the output end of the power management chip is connected with the SD card through the USB port;

The camera module is used for recording high-definition driving images;

the main control chip is used for analyzing and coding 1080P high-definition images recorded by the camera module;

the image processing chip is used for recoding the driving image subjected to coding processing;

and the power management chip is used for controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port.

5. The device of claim 4, wherein the main control chip is an MTK8665 main control chip.

6. the device of claim 4, wherein the image processing chip is an MTK6625GPU image processing chip.

7. The device of claim 4, wherein the power management chip is a MTK6328 power management chip.

Technical Field

the invention relates to the field of automobile data recorders, in particular to an anti-interference method and device for simultaneous working of a high-definition automobile data recorder and an FM (frequency modulation).

Background

the automobile data recorder is an instrument for recording images, sounds and other related information during the running of a vehicle, and along with the development of the era, the high-definition automobile data recorder becomes an indispensable electronic accessory of the vehicle, but a radio and the high-definition automobile data recorder work simultaneously in the running process of the vehicle, a data storage link of the high-definition automobile data recorder can interfere with FM (frequency modulation) broadcasting frequency (87MHZ-108MHZ), the FM can generate noise and noise, and the experience of people is greatly influenced.

Disclosure of Invention

the invention mainly aims to provide an anti-interference method and device for a high-definition automobile data recorder and an FM (frequency modulation) simultaneously working, so as to solve the problems that in the prior art, a data storage link of the automobile data recorder can interfere FM broadcast frequency (87MHZ-108MHZ), and FM can generate noise and noise.

In order to achieve the above object, according to an aspect of the present invention, an anti-interference method for a high-definition car recorder and an FM working simultaneously is provided, where a camera module, an SD card, a USB port, a main control chip, an image processing chip, and a power management chip are provided, and the method includes the following steps:

s1, the high-definition automobile data recorder starts to work, and the camera module records automobile images;

s2, analyzing the 1080P high-definition image recorded by the camera module through the main control chip and coding the image;

S3, inputting the driving image after the coding processing into an image processing chip for recoding processing;

and S4, calling a power management chip, controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port.

further, the encoding process in step S2 specifically includes:

converting the original YUV format into an H.264 format;

dividing the image into segments every 60 seconds;

the segments are renamed chronologically.

Further, the recoding process in step S3 specifically includes:

Converting the H.264 format into an mp4 format;

The volume of each image segment is compressed.

According to another aspect of the invention, an anti-jamming device for a high-definition automobile data recorder and an FM (frequency modulation) simultaneously working comprises a camera module, an SD (secure digital) card, a USB (universal serial bus) port, a main control chip, an image processing chip and a power management chip, wherein the output end of the camera module is connected with the input end of the main control chip, the output end of the main control chip is respectively connected with the image processing chip and the power management chip, and the output end of the power management chip is connected with the SD card through the USB port;

the camera module is used for recording high-definition driving images;

The main control chip is used for analyzing and coding 1080P high-definition images recorded by the camera module;

the image processing chip is used for recoding the driving image subjected to coding processing;

and the power management chip is used for controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port.

further, the master control chip is an MTK8665 master control chip.

Further, the image processing chip is an MTK6625GPU image processing chip.

Further, the power management chip is an MTK6328 power management chip.

By adopting the anti-interference method and the device for the high-definition automobile data recorder and the FM working simultaneously, hardware resources (MTK8665 main control chip, MTK6328 power management chip and MTK6625GPU image processing chip) are called to process image data and store the image data into the SD card in a segmented manner through the USB port, the current of the USB port of the automobile data recorder is controlled, the transmission speed of the USB port is accelerated, the electromagnetism generated in the storage link of the automobile data recorder and the FM broadcast frequency (87MHZ-108MHZ) do not work at the same frequency, and the problem of the interference of the automobile data recorder on a radio is solved.

Drawings

Fig. 1 is an execution flow chart of an anti-interference method when a high-definition automobile data recorder and an FM work simultaneously according to the present invention.

fig. 2 is a block diagram of an anti-jamming device when a high-definition automobile data recorder and an FM simultaneously work according to the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As described in the background art, the data storage link of the prior art high-definition car recorder interferes with the FM broadcast frequency (87MHZ-108MHZ), and the FM generates noise and noise, which greatly affects the experience of people.

in order to solve the problem, the invention provides an anti-interference method for a high-definition automobile data recorder and an FM simultaneously working, as shown in fig. 1, the method needs to provide a camera module, an SD card, a USB port, a main control chip, an image processing chip and a power management chip, and comprises the following steps:

S1, the high-definition automobile data recorder starts to work, and the camera module records automobile images;

s2, the 1080P high-definition images recorded by the camera module are analyzed and coded through the main control chip, and the method specifically comprises the following steps:

Converting the original YUV format into an H.264 format;

dividing the image into segments every 60 seconds;

the segments are renamed chronologically.

s3, inputting the driving image after encoding into an image processing chip for re-encoding, specifically:

converting the H.264 format into an mp4 format;

the volume of each image segment is compressed.

S4, calling a power management chip, controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port;

As shown in fig. 2, an anti-jamming device for a high-definition car recorder and an FM working simultaneously comprises a camera module, an SD card, a USB port, a main control chip, an image processing chip, and a power management chip, wherein an output end of the camera module is connected with an input end of the main control chip, an output end of the main control chip is connected with the image processing chip and the power management chip, and an output end of the power management chip is connected with the SD card through the USB port;

The camera module is used for recording high-definition driving images;

The main control chip is used for analyzing and coding 1080P high-definition images recorded by the camera module;

The image processing chip is used for recoding the driving image subjected to coding processing;

and the power management chip is used for controlling the voltage of the USB port and writing the image data subjected to recoding processing into the SD card in a segmented manner through the high-speed USB port.

Preferably, the master control chip is an MTK8665 master control chip.

more preferably, the image processing chip is an MTK6625GPU image processing chip.

Preferably, the power management chip is a MTK6328 power management chip.

The 1080P high-definition images recorded by the automobile data recorder camera module are coded by the MTK8665 main control chip through software instructions, the original video is in a YUV format and is converted into an H.264 format after being processed by the MT8665 main control chip, and then the image data are divided and renamed;

inputting the driving video after encoding processing into an image processing chip for re-encoding processing, processing the video in the H.264 format into an MP4 format, compressing the volume of each video clip, wherein each clip in the MP4 format is about 43.8MB, and the frame width is as follows: 1920, frame height: 1080, data rate: 6003kbps, frame rate: 23 frame seconds;

finally, calling a power management chip; writing the image data subjected to the recoding processing into the SD card in blocks through the high-speed USB port;

because the transmission speed of the USB port is increased by storing data in sections, the electromagnetic interference generated in the storage link of the high-definition automobile data recorder and the FM broadcast frequency (87MHZ-108MHZ) do not work at the same frequency, and the problem of interference of the high-definition automobile data recorder on a radio is solved.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.