This dissertation primarily studies the conversion from MPEG-1/2streams to MPEG-4streams ,including MPEG-1/2streams decoding and optimization,MPEG-4video and audio streams encoding and optimization,and the synthesizing of MPEG-4video and audio encoded streams.
261 which is used in 64K video transmission, MPEG-1 which is used in 1.5M video and audio transmission and storage,MPEG-2 which is used high quality digital video and audio transmission and storage ,H.
By using existing network infrastructure,IP video frequency transmits data,video and audio signals at the cheapest price through public and special networks so as to realize the faster and higher-quality communication service.
Considering the unique structure of news video, this paper presents a semantic scene segmentation model taking advantage of both video and audio information. Using SQL Server2000, a massive capability database is implemented for saving video data with a general news video retrieval system.
It is the core to video and audio transfer for passenger information system in subway. Through the research of MPEG series standards, this paper makes advanced analysis about MPEG-2 package and multiplex and adopts MPEG-2 encoding to transfer video and audio information.
Real-Time Automated Video and Audio Capture with Multiple Cameras and Microphones
Several media, continuous, like video and audio files, and non-continuous, like text pages and images, are delivered separately in a distributed environment like the World Wide Web, and presented to the user in a coordinated way.
Multimedia presentations (e.g., lectures, digital libraries) normally include discrete media objects such as text and images along with continuous media objects such as video and audio.
A special effort is given to the correct implementation of video and audio synchronization after frame-drop.
Scene Determination Based on Video and Audio Features
A brief survey is given to the new advances of MPEG-1 chips for encoding/decoding of multi-media video and audio signals.
Advanced source(video and audio)coding technologies and advanced digital transmission technologies(modulation/demodulation, error-correction coding and adaptive channel equalization)have been adopted in digital television,bringing to the latter many new eminent characteristics,as well as its promising prospects.A new digital television system is emerging, and it would gradually substitute the existing analogue television system, while inheritting the its technologies.