How to define HD IP Camera from the sharpness of the image

How to define HD IP Camera from the sharpness of the image
Currently, the definition of the security industry for high-definition monitor (resolution) the prevalence of the two concepts, namely megapixels and 720p/1080i/1080p resolution (clarity) of these two standards is HD.
Megapixels is not a recognized high-definition standard, it is only on behalf of the photosensitive chip to achieve an indicator, specifically referring to the camera's image sensor photosensitive element number. The camera's resolution by the effective number of pixels, the image processing ISP chip, scan format, the quality of the lens, and many other factors. In other words, when we hear a HD IP Camera support megapixels to 20 megapixels or 50 megapixels, we do not know the camera's resolution (TVL), frame rate, video width high than how, interlaced or progressive scan, color fidelity how this information is also an important reference to measure a high-definition camera performance. Of course, most megapixels or more surveillance cameras resolutions up to HD standards.
Part of the domestic manufacturers launch due to technical limitations deliberate distortion of the concept of "high definition" unworthy of the name of the product. HD is not just the front of the camera resolution of the problem of the light-sensitive chip, it relates to the bottom of the chip processing power and storage, platform applications. Some manufacturers called 960H-line solutions-based analog cameras the HD analog cameras, and industry experts call it high-wire analog cameras, foreign enterprises basically hold this view.
Sony 1/3 ", 1/4" 960HCCDSensor, the pixel value is about 976x582 = 57 million, known as the 60 million pixels (1280 x 720 = 920,000, far below the 720p camera pixel values, often referred to megapixels ) and 1080p, 1080i pixel value (both 1920 × 1080 = 207 000. often referred to as two megapixels).
Not to mention 960H high-wire analog cameras tend to use interlaced scanning, while the same the photosensitive chip interlaced image clarity is lower than progressive scanning. 960H as a simulation of high-resolution cameras to analog HD transition, a clear technological advantage in the other aspects of image clarity compared to traditional analog cameras, but also can not be considered a HD IP Camera.
The market there is a commercial based on the H.264 standard HD IP Camera, clarity is usually up to 720P, but frame rate 15FPS following, strictly speaking, this camera also can not be regarded as the standard high-definition camera.

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From:http://www.vstarcam.com/channel/How-to-define-HD-IP-Camera-from-the-sharpness-of-the-image-97.html