Course: Introduction to Digital Media

Lossy compression definition Lossy compression is a compression in which some information in the original information sequence is lost. This means that once the original information is manipulated by the …

MPEG-X MPEG-1 MPEG-1 is the first video coding standard developed by ISO/IEC MPEG working group. Specifically for CD media customization, completed in 1991, 1992 was officially approved as the world …

In 1948, Shannon et al. used pulse code modulation technology to digital processing of analog signals, indicating the origin of digital video compression coding technology. Since its inception, the technology …

The purpose of inter-frame prediction is to remove the temporal redundancy of video. In a video sequence, two temporally adjacent frames often have high similarity, so the coded units of …

GIF GIF was developed in 1987 by Compu Serve to fill the gap of cross-platform image formats as a kind of bitmap. The general idea is that an image is …

Predictive coding Predictive coding is based on the strong spatial and temporal correlation between image and video data. The current pixel value is predicted by the neighbor pixel values with …

Concept Images are divided into two categories: color images and gray images. Binary images are special gray images with only black and white gray levels, such as documents, weather maps, …

The existence of redundant information is the basis of image compression, and the process of compression coding is to remove all kinds of redundant information of the image, which mainly …

In computers, information is encoded in patterns of 0s and 1s. These numbers are called bits (which means binary digits). Although you might be tempted to associate them with the …

With the rapid development of information processing technology and sensor devices, the spatial resolution, temporal resolution and quantization depth of images are constantly improved, and the amount of data is …

Concept Speech synthesis is the conversion of arbitrary input text into machine generated speech. The purpose of speech synthesis technology is to make the machine have the ability to speak …

Speech coding is the conversion of analog signals into digital signals by coding, also known as digital phonetization. The effect of coding rate reduction is achieved by using human auditory …

Concept Based on one or more segments of speech data, recognize which voice is said by “who”. Also known as “Voiceprint Recognition”. Find out the personality factors of the speaker …

Digital audio compression is essential for reducing the data size of audio signals, employing various techniques to balance file size and sound quality for efficient storage and transmission. Definition of …

Digital video compression encompasses a suite of techniques designed to minimize video file sizes, leveraging spatial and temporal redundancies for efficient storage and transmission. Definition of digital video compression Digital …