With the rapid development of the electronic technology, multimedia technology and mobile communication technology, video monitoring system is going to the embedded, digital and wireless direction. In this paper, a solution of wireless video monitoring system based on WCDMA is proposed. This solution makes full use of the advantages of 3G, which have Extensive coverage network and wide bandwidth. It can capture the video streaming from the chip's video port, real-time encode the image data by the high speed DSP, and have enough bandwidth to transmit the monitoring image through WCDMA wireless network. The experiments demonstrate that the system has the advantages of high stability, good image quality, good transmission performance, and in addition, the system has been widely used, not be restricted by geographical position since it adopts wireless transmission. So, it is suitable used in sparsely populated, harsh environment scenario.
Video systems have been widely used in many fields such as conferences, public security, military affairs and medical
treatment. With the rapid development of FPGA, SOPC has been paid great attentions in the area of image and video
processing in recent years. A network video transmission system based on SOPC is proposed in this paper for the
purpose of video acquisition, video encoding and network transmission. The hardware platform utilized to design the
system is an SOPC board of model Altera's DE2, which includes an FPGA chip of model EP2C35F672C6, an Ethernet
controller and a video I/O interface. An IP core, known as Nios II embedded processor, is used as the CPU of the system.
In addition, a hardware module for format conversion of video data, and another module to realize Motion-JPEG have
been designed with Verilog HDL. These two modules are attached to the Nios II processor as peripheral equipments
through the Avalon bus. Simulation results show that these two modules work as expected. Uclinux including TCP/IP
protocol as well as the driver of Ethernet controller is chosen as the embedded operating system and an application
program scheme is proposed.
With the rapid development of the electronic technology, multimedia technology and network technology, video
monitoring system is going to the embedded, digital direction. In this paper, a solution of embedded video monitoring
system based on OMAP5912 is proposed. This solution makes full use of the advantages of dual-core of OMAP, which
include ARM core and DSP core. Non-realtime task such as user interface and control unit is assigned to ARM, and realtime
task such as video encoding is assigned to DSP. The capture and control task of the ARM side and the video
encoding task of the DSP side are described in detail. The experiments demonstrate that the video encoding speed has
been greatly improved by the proposed system comparing with the single ARM chip system. The frame rate of the
monitoring system is increased in a large scale, and more suitable for the application in practice.
Motion estimation and compensation play important roles in video coding. The most commonly used motion estimation
technique is block matching. In recent years, the global motion compensation (GMC) is paid great attentions because it is
an important tool for a variety of video processing applications including for instance registration, segmentation and
video coding. The phase correlation is a typical global motion estimation (GME) method in frequency domain. In this
paper, a new 4-parameter GME method is proposed based on the Fourier transform properties of the tow images before
and after global motion. At first, the scale and rotation parameters of the affine transform are estimated according to the
formulas derived in this paper. Then the effect of scale and rotation of the affine transform are corrected with the
estimated parameters. After that, the well-known phase correlation technique is used to determine the two shift
parameters. An algorithm according to this principle is proposed in this paper, and simulation results show that the 4
affine parameters can be exactly estimated with our new method.
In this paper, an IP-based video lab-monitor system is proposed in order to efficiently supervise and manage the Electrical Engineering Example Lab Center of Hubei Province. The proposed system is composed of one Control & Display Unit (CDU) and a number of Lab View Units (LVU). The CDU is placed in the lab-supervisor’s office, while each LVU with a video camera is placed in one of the labs to be watched. The CDU and all LVUs are connected with an IP network. An LVU is mainly composed of 4 parts: Video Capture, Video Encoder based on H.263, Media Deliverer and Communication Controller. Accordingly, the CDU is composed of the following parts: a Center Controller, a Media Receiver, a Multi-Video Decoder and a Multi-Video Displayer. The supervisor can simultaneously watch the dynamic scene of 16 (4x4) labs on the CDU, with a resolution of 176 x 144 for each lab. He may choose to watch 4 (2x2) labs or only one lab at a time with higher resolution.