Course: Introduction to Digital Media

Digital image compression, a vital aspect of digital media technology, involves reducing the size of image files through sophisticated encoding techniques while maintaining acceptable visual quality. Definition of digital image …

Data compression is a critical technique in digital media technology that optimizes storage and transmission by reducing file sizes. Definition of data compression Data compression is the process of encoding …

Physical properties of speech Speech is a kind of physical movement, so it has physical properties. The physical properties of speech refers to the physical properties of speech, also known …

Concept Digital speech communication is a kind of communication method that transmits voice messages in digital form after processing the input analog speech signal. Compared with analog speech communication, digital …

Syllables, phonemes Syllable is the basic unit of speech structure, which is the smallest piece of speech that is naturally emitted when speaking and naturally felt when obedient. Syllables are …

Peripheral auditory system Psychoacoustic models are formed by modeling the ear structure of the peripheral auditory system and some psychoacoustic phenomena. The human peripheral auditory system is a system that …

Sound intensity Sound intensity refers to the average sound energy passing through a unit area normal to the direction of sound wave propagation per unit time. It is a physical …

Loudness Loudness is the human ear’s subjective perception of the intensity of a sound. Loudness is not only proportional to the log value of the loudness of the sound, but …

Concept Digital audio refers to the use of pulse code modulation, digital signals and other technologies to process analog signals, and it is recorded and played back a method. Analog …

Video calling Video calling is divided into two ways: over the Internet Protocol (IP) line and over the regular telephone line. Video call usually refers to a communication method based …

With the development of computer technology and network technology, the construction of information superhighway, and the popularization and application of multimedia, all kinds of video materials are continuously produced. More …

A video data is different from a series of arbitrary pictures that are simply stacked along the time axis. The images composing the video have strong correlation on the time …

Optical Character Recognition Optical Character Recognition (OCR) refers to the process of analyzing and recognizing the image files of text data to obtain the text and layout information. The processing …

Using AI video conversion technology, the old low-definition video can be repaired and regenerated, so that the visual perception of clarity can be improved, so as to improve the quality …

Geometric transformations of images in the spatial domain Translation transformation Construct a translation transformation matrix and then apply this matrix to (matrix left-multiply) each pixel of the original image to …