In the parameter settings of the IPC, you may not know the specific meanings of the following parameter settings. Below are some common concepts (encoding mode, resolution, frame rate, code stream control, I-frame interval). Etc.). Let’s study.
H.264 is a highly compressed video codec standard after MPEG-1, MPEG-2, and MPEG-4. The compression efficiency is 2 times higher than that of MPEG-2 under the same graphics quality.
H.265 is a new video coding standard formulated by ITU-T VCEG after H.264. Based on the original standard, H.265 improves the relationship between code stream, coding quality, delay, and algorithm complexity to optimize coding.
Montion Joint Photographic Experts Group, that is, moving still image (or frame by frame) compression technology.
MPEG-4 is a format developed by MPEG-2 for transmitting video data during low-speed transmission.
Surveillance Video and Audio Coding Technical Standards, for Security and Surveillance Digital Surveillance Video and Audio Coding, are technical standards that address the unique requirements of the security and surveillance industry.
Resolution includes display resolution and image resolution. Display resolution refers to the number of display pixels per unit area; image resolution refers to the amount of information stored in an image, which is how many pixels per inch of image.
D1 is the standard for the display format of digital television systems.
720P is a display format that achieves a resolution of 1280 × 720 under progressive scanning. The number 720 indicates that there are 720 horizontal scanning lines in the vertical direction, and the letter P (Progressive scan) indicates progressive scanning.
960P is a display format that achieves a resolution of 1280 × 960 under progressive scanning. The number 960 indicates that there are 960 horizontal scanning lines in the vertical direction, and the letter P (Progressive scan) indicates progressive scanning.
1080P is a display format that achieves a resolution of 1920 × 1080 under progressive scanning. The number 1080 indicates that there are 1080 horizontal scanning lines in the vertical direction, and the letter P (Progressive scan) indicates progressive scanning.
Frames per Second, which describes the update frequency of the video stream, the unit is FPS or Hz.
When the code stream control method is variable code stream, the camera adjusts the video code stream in real time according to the network bandwidth to ensure the normal display of the video picture when the network bandwidth is insufficient.
The number of interval frames between two I-frames. I-frames are also called key frames. They are used to record information about the entire image. The larger the value, the smaller the storage space occupied by the compressed video.
SVC (SCALABLE VIDEO CODING)
Scalable Video Coding is a technology of video coding. It can divide the video stream into a base layer and multiple enhancement layers according to requirements. The base layer provides users with the most basic video quality, frame rate and resolution, and the enhancement layer improves the video quality.
In order to add certain digital information to the data multimedia that does not affect the integrity of the original file, after obtaining the information, unauthorized users cannot understand the content of the information because they do not know how to handle the information to ensure the security of the data.
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