IP Network cameras in our lives

HD monitoring the premise of HD IP Camera

Analog and digital high-definition, there are many design flaws, making it difficult in the current technical architecture greatly improved resolution, frame rate, etc.. Take clarity, the existing analog CCTV surveillance system, the cameras capture the vertical resolution of 625 lines in PAL standard, ultra-high-definition products reached 540,600 lines to the basic limit of analog systems. The Network Camera has no upper limit (megapixels network camera can easily see more than 1000 lines). So the HD cameras currently on the market used to monitor network cameras.

HD IP Camera is greater than 12FPS continuous acquisition maximum resolution greater than 720P (1280 * 720), and even meet or exceed the 1080P (1920 * 1080) network cameras. Meet the above HD defined 720P standard, can be understood as the the megapixels level, also known as HD IP Camera megapixels network cameras, megapixels Network Camera than traditional analog cameras, the ordinary Network Camera with the following advantages:

Megapixels sensor, you can get more video information, generally up to 1280 × 1024,1392 × 1024,1628 × 1236 or 2048 × 1536 resolution;

Megapixels lens, lens megapixels lens tested in the same environment, megapixels lens can better match megapixels sensor to obtain a sharper image.

The image display of higher quality, better able to capture the details;

Progressive scan CCD / CMOS dynamic performance of the screen more smoothly;

Can support the HDTV widescreen output mode (16:9);

Coverage, the same monitoring area can replace the original multiple fixed point camera and an omnidirectional camera.

The camera's resolution depends on the sensor performance CCD and CMOS two sensor, the CCD sensor in terms of sensitivity, resolution, noise control, high-quality image output, dynamic image performance is better than the COMS, analog cameras with SD Most of the network camera select the CCD photosensitive element. But the response speed of the CCD, does not apply to high-definition surveillance cameras with high-resolution progressive scan, HD IP Camera is commonly used CMOS sensor.

The image compression format directly determines the transmission network, the video storage, back-end processing requirements, but also significantly affect the image quality. Currently widely used in HD Network Camera image compression technology have JPEG/MPEG-4/H.264 three ways, each compression mode have different characteristics. Such as JPEG to FRAME highest quality, and the camera processing platform also lower, but the continuous image compression occupied bandwidth; H.264 can obtain the highest compression ratio, but the camera itself processing platform requirements the highest. In order to adapt to different application requirements and network environment, high-end HD IP Camera with three encoding capabilities and dual-stream, multi-stream function.

High-definition monitor problems faced by

HD IP Camera image sharpness been a qualitative leap brought a series of real problems, but also to the high-definition surveillance system:

2 network bandwidth tension: the greater the resolution, ultra-high definition, means that during the time of data transmission stream also increases, to increase the pressure of the network bandwidth.

3 large storage space: data traffic doubled, increasing the recording capacity to bring pressure on the network storage.

Central control, management software and hardware performance requirements grow exponentially;

For recording the video image management and post-mortem analysis of the workload will grow exponentially;

The high investment cost.

Therefore, in the pursuit of high quality at the same time, we have to consider to solve the above problems.

HD monitoring on-demand applications

The high-definition monitor technical challenges can be resolved through the application. Under the current situation, the user should not be blind pursuit of high-definition. If all front-end monitoring points are used for HD Network Camera, and used in all real-time high-definition transmission, storage and transmission of the back-end will cause a lot of pressure, and cause the waste of cost and efficiency. Therefore, we should design the right solution based on the needs of users, such as in high-risk workplace design HD megapixels IP Camera installed, under normal circumstances, only the ordinary resolution (CIF, D1) to transmit real-time video image, while in alarm condition occurs when a high-resolution JPEG transmitted in the form of high-resolution images, in order to enlarge afterwards, control the details. This can greatly ease the pressure on the network, storage pressure, reduce investment costs.

Stream HD IP Cameras currently on the market, the support JPEG/MPEG-4/H.264 three different video compression format, these three code stream can be set in accordance with the actual situation of the customer. For example: the lower stream H.264 video compression format D1 image transmission to remote real-time monitoring megapixels H.264 video compression format real-time image afferent storage server for video, can also be transmitted alarm megapixels JPEG images, easy afterwards to zoom confirmation, looking for suspicious objects.

In short, we have to follow the following principles: smaller real-time image transmission usually occupied bandwidth, and transmit images at a critical time HD image.

From:http://www.vstarcam.com/channel/HD-monitoring-the-premise-of-HD-IP-Camera-106.html