CN212850675U

CN212850675U - Zynq FPGA-based low-illumination handheld terminal

Info

Publication number: CN212850675U
Application number: CN202022310724.XU
Authority: CN
Inventors: 邓羿
Original assignee: Shenzhen Skyvision Technology Co ltd
Current assignee: Zhongke Tianji (Xinjiang) Aerospace Information Co.,Ltd.
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-03-30
Anticipated expiration: 2030-10-16

Abstract

The utility model discloses a handheld terminal of low light level based on zynq FPGA, its characterized in that: the display access module, the coding storage access module, the storage module and the image encoder are respectively communicated with the central processing unit through the data bus, the display access module is used for playing videos acquired by the handheld terminal in real time, and the coding storage access module is used for synchronously storing the videos acquired by the handheld terminal. The utility model discloses a display channel module can realize the real-time processing to video image, does not use DDR buffer memory direct output to the display screen, improves the real-time of watching; the coding storage channel module has the parallel coding and decoding functions, the display and coding delay is small, and the display data are not conflicted.

Description

Zynq FPGA-based low-illumination handheld terminal

Technical Field

The utility model belongs to the technical field of image processing, especially, relate to a handheld terminal of low light level based on zynq FPGA.

Background

At present, the display data is accessed through DDR, and the delay is higher. Therefore, when a viewer watches video by holding the watching device, the viewer is easy to feel dizzy. Therefore, it is necessary to improve the real-time property of image video viewing and to reduce the frame rate, thereby making viewing more intuitive and comfortable and preventing vertigo.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a handheld terminal of low light level based on zynq FPGA aims at solving the problem that exists among the background art. For realizing the purpose, the utility model discloses a technical scheme be:

the utility model provides a handheld terminal of low light level based on zynq FPGA which characterized in that: the image acquisition module is electrically connected with the display access module and the coding storage access module respectively, and the display access module, the coding storage access module, the storage module and the image encoder are communicated with the central processing unit through the data bus respectively.

Furthermore, the data BUS adopts AXI-BUS protocol.

The system further comprises a system framework for realizing real-time video playing and synchronous video storage, wherein the display access module is used for playing the video acquired by the handheld terminal in real time, and the coding storage access module is used for synchronously storing the video acquired by the handheld terminal.

Further, the implementation method of the display path module includes the following steps:

s1, acquiring video image data of the environment by a camera/image sensor on the handheld terminal;

s2, the hand-held terminal transmits the acquired video image data to the image conversion module through the video image transmission channel;

s3: the image conversion module uniformly converts the video image data into RGB color gamut video image data through YCbCr 2 RGB;

s4: processing RGB color gamut video image data through a layer mixer to complete OSD mixing;

s5: the central controller controls the transmission of the video image data which is subjected to OSD mixing in the S4 to the output module through a data bus;

s6: and outputting the video image data to an OLED display screen for displaying.

Further, the implementation method of the coding memory channel module comprises the following steps:

s2: the handheld terminal transmits the acquired video image data to the image conversion module through the video image transmission channel;

s3: the image conversion module carries out VID-in processing on the video image data and outputs the video image data into RGB color gamut video image data in a unified way;

s4: sampling the video image data of S3 and converting it from 422 format to YCbCr of 420 format;

s5: writing the video image data into the ddr memory through a data bus by a frame cache controller;

further, the code memory path module further includes:

s6: the H.264 encoder performs encoding compression on 420 video image data;

s7: and the central controller writes the coded video image data into the SD card through the data bus to finish external storage of the video image data.

Further, the video image transmission channel is composed of one or two interfaces of CSI or DVP.

The utility model has the advantages that:

1. the display channel can realize real-time processing of video images, and a DDR cache is not used to directly output the video images to a display screen, so that the real-time viewing performance is improved;

2. the image data has the parallel coding and decoding functions, the display and coding delay is small, and the display data does not conflict.

Drawings

Fig. 1 is a schematic view of a video image processing framework of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. As used herein, the terms "vertical," "horizontal," "left," "right," and the like are for illustrative purposes only and do not represent the only embodiments, and as used herein, the terms "upper," "lower," "left," "right," "front," "rear," and the like are used in a positional relationship with reference to the drawings.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

As shown in fig. 1, the embodiment of the utility model provides a handheld terminal of low light level based on zynq FPGA, its characterized in that: including image acquisition module 1, show route module 2, code memory access module 3, storage module 4, central processing unit 5, image encoder 6 and data bus 7, image acquisition module 1 respectively with show route module 2, code memory access module 3 electric connection, show route module 2, code memory access module 3, storage module 4 and image encoder 6 respectively through data bus 7 and central processing unit 5 communication.

In this embodiment, the data BUS 7 uses the AXI-BUS protocol.

In this embodiment, the system includes a system framework for implementing real-time video playing and synchronous video storage, the display path module 2 is configured to play a video acquired by the handheld terminal in real time, and the encoding storage path module 3 is configured to store a video acquired by the handheld terminal in synchronization.

In this embodiment, the method for implementing the display path module 2 includes the following steps:

s1, acquiring video image data of the environment by an image acquisition module 1 (a camera/an image sensor) on the handheld terminal;

In this embodiment, the implementation method of the coding storage path module 3 includes the following steps:

s5: writing the video image data into a storage module 4(ddr internal memory) through a data bus by a frame buffer controller;

in this embodiment, the encoding memory path module 3 further includes:

s6: the image encoder 6(h.264 encoder) performs encoding compression 420 on the video image data;

s7: the central controller 5 writes the encoded video image data into the SD card through the data bus 7, and completes the external storage of the video image data.

In this embodiment, the video image transmission channel is composed of one or two interfaces of CSI or DVP.

In the actual work process, handheld terminal carries out the during operation, call this system, but because show route module 2 and coding memory route module 3 simultaneous working in the course of the work, the video image data that directly will hand the terminal acquisition through showing the route module promptly directly shows the broadcast, video image data coding stream has been reduced and has been changeed to storage module 4(ddr), decode again and play this process to the display screen, frame rate greatly reduced to the video broadcast, the real-time of watching is better, thereby it is more direct-viewing comfortable to make, be difficult for producing dizzy sense. Meanwhile, in order to ensure the traceability of the video image data, the coding storage path module 3 carried by the system is responsible for coding the recorded video image data and writing the coded video image data into a ddr memory or an externally inserted SD card carried by the handheld terminal in the video image display process, so that the traceability of the video image data is ensured.

The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. The utility model provides a handheld terminal of low light level based on zynq FPGA which characterized in that: the image acquisition module is electrically connected with the display access module and the coding storage access module respectively, and the display access module, the coding storage access module, the storage module and the image encoder are communicated with the central processing unit through the data bus respectively.

2. The zynq FPGA-based low-illumination handheld terminal according to claim 1, wherein: the data BUS adopts AXI-BUS BUS protocol.