TAILIEUCHUNG - Lecture BSc Multimedia - Chapter 14: MPEG audio

Chapter 14 provides knowledge of MPEG audio. After studying this chapter you will be able to understand: Audio compression (MPEG and others), simple but limited practical methods, psychoacoustics or perceptual coding,. | CM3106 Chapter 14 MPEG Audio Prof David Marshall and Dr Kirill Sidorov CARDIFF UNIVERSITY PRIFYSCOL CAERpv School of Computer Science Informatics Cardiff University UK Audio Compression MPEG and Others As with video a number of compression techniques have been applied to audio. RECAP Already Studied Traditional lossless compression methods Huffman LZW etc. usually don t work well on audio compression For the same reason as in image and video compression Too much change variation in data over a short time CM3106 Chapter 14 MPEG Audio Audio Compression Introduction 1 Simple But Limited Practical Methods Silence Compression detect the silence similar to run-length encoding seen examples before Differential Pulse Code Modulation DPCM Relies on the fact that difference in amplitude in successive samples is small then we can used reduced bits to store the difference seen examples before CM3106 Chapter 14 MPEG Audio Audio Compression Introduction

• Điện - Điện tử
• BSc Multimedia
• Multimedia applications
• Multimedia data
• MPEG audio
• Adaptive predictive coding
• Audio compression
• Multimedia systems
• Format text
• Multimedia data compression
• Multimedia data basics
• Continuous media
• Digital signals
• Digital audio synthesis
• Digital audio signal processing
• Multimedia data acquisition
• Basic compression algorithms
• Modeling multimedia data
• Information theory
• Fourier transform
• Digital signal processing
• Digital audio
• Digitising sound
• Digital sampling
• Subtractive synthesis
• Wavetable synthesis
• MPEG 4 audio compression
• MIDI system
• MIDI messages
• Digital audio effects
• Effects types
• Digital audio filtering effects
• Discrete cosine transform
• Frequency domain
• Joint Photographic Expert Group
• Quantisation tables
• Differential Pulse Code Modulation
• MPEG video
• Video compression
• Decoding motion of blocks
• MPEG 4 video
• MPEG 4 video compression
• Object based coding
• Content based retrieval
• Image retrieval
• Audio fingerprints