1, Clarity and Background: Elegant May 4th Standard Definition (SD) is the standard for making SD digital TV programs based on the aspect ratio of 4: 3. It is a standard issued by the State Administration of Radio, Film and Television of China in 2006, aiming at improving the picture quality and sound quality of TV programs and meeting the viewing needs of the broad audience.
2. Production specification: video format, screen aspect ratio of 4: 3, resolution of 720x576i, progressive scanning. The audio format is stereo, the sampling frequency is 48kHz, and the quantization bits are 16 bits. Coding mode: MPEG-2 coding mode is adopted, and the compression coding ratio is 4: 1. Transmission mode: serial digital signal transmission mode is adopted, and the transmission rate is not lower than 19.3Mbps.
3. Technical Advantages and Disadvantages: The technical advantage of elegant May 4th standard definition lies in the adoption of advanced digital TV coding technology and transmission technology, which can realize high-definition and high-quality audio and video transmission. At the same time, it also supports a variety of video output methods, which can meet the needs of different fields. However, its disadvantage lies in the high production cost and the need to invest a lot of money and technical support.
The application fields defined by the elegant May 4th standard.
1, TV program production and broadcast: news programs, elegant May 4th standard definition can provide high-quality video images and audio effects, make news programs more vivid and enhance the audience's viewing experience. Variety shows can make the pictures of variety shows clearer and more stable, improve the audio quality of the programs and bring a pleasant viewing experience to the audience through the elegant May 4th standard.
2. Film production: The elegant May 4th Standard Definition is also widely used in film production. Provide high-definition picture and sound quality, so that the picture effect of the film is more realistic and the sound effect is more stereoscopic, which enhances the audience's viewing experience.
3. Video conference: The elegant May 4th standard definition can provide high-quality video and audio effects, so that participants in the video conference can see each other more clearly and improve the efficiency and accuracy of communication. Distance education: The elegant May 4th standard setting can provide an effect similar to on-site teaching, making the effect of distance education closer to on-site teaching and improving students' learning effect and participation.