source:Industry Trends release time:2024-07-18 Hits: Popular:led screen wholesaler
The DLP large screen digital monitoring system has a huge amount of data for sound, image, video, and animation. The 1-minute stereo sound sampling frequency is 44.1kHz, and the data volume with 16 bit quantization accuracy is approximately 10 MB. It takes about 40MB to store a 4-minute song; The storage capacity of a 640x480 RGB color image is 900kB; The video data volume of 1 second (25 frames per second) is 22MB, and a 650 MB CD-ROM can only store about 30 seconds of video.
There is a significant amount of redundancy in the large amount of data for sound, image, video, and animation in DLP large screen digital monitoring systems. There is a significant correlation between adjacent pixels in an image and between frames before and after a video sequence. The human ear and eye have auditory and visual characteristics such as masking effects. Therefore, redundant information in the data can be removed based on its inherent connections, and the data volume can be reduced through compression encoding.
The DLP large screen digital monitoring system has a large amount of digital audio and video data, which must be compressed and encoded during storage and transmission. After compression, audio and video digital signals can transmit 2-4 sets of standard definition television (SDTV) programs or one set of high-definition television (HDTV) programs on a transmission channel of 6-8 MHz, while a compressed format DVD storage capacity can reach 7-8CB.
The DLP large screen digital monitoring system does not accumulate noise and distortion in the digital signal, making it easy to store, control, and modify. Digital audio and video can be replicated countless times without distortion, while analog audio and video signals accumulate errors every time they are transcribed, resulting in signal distortion. The quality of analog audio and video will decrease after long-term storage, while digital audio and video can be stored for a long time without any distortion.
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