tailieunhanh - Báo cáo hóa học: " Parametric Coding of Stereo Audio"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Parametric Coding of Stereo Audio | EURASIP Journal on Applied Signal Processing 2005 9 1305-1322 2005 Jeroen Breebaart et al. Parametric Coding of Stereo Audio Jeroen Breebaart Digital Signal Processing Group Philips Research Laboratories 5656 AA Eindhoven The Netherlands Email Steven van de Par Digital Signal Processing Group Philips Research Laboratories 5656 AA Eindhoven The Netherlands Email Armin Kohlrausch Digital Signal Processing Group Philips Research Laboratories 5656 Eindhoven The Netherlands Department of Technology Management Eindhoven University of Technology 5656 AA Eindhoven The Netherlands Email ErikSchuijers Philips Digital Systems Laboratories 5616 LWEindhoven The Netherlands Email Received 27 January 2004 Revised 22 July 2004 Parametric-stereo coding is a technique to efficiently code a stereo audio signal as a monaural signal plus a small amount of parametric overhead to describe the stereo image. The stereo properties are analyzed encoded and reinstated in a decoder according to spatial psychoacoustical principles. The monaural signal can be encoded using any conventional audio coder. Experiments show that the parameterized description of spatial properties enables a highly efficient high-quality stereo audio representation. Keywords and phrases parametric stereo audio coding perceptual audio coding stereo coding. 1. INTRODUCTION Efficient coding of wideband audio has gained large interest during the last decades. With the increasing popularity of mobile applications Internet and wireless communication protocols the demand for more efficient coding systems is still sustaining. A large variety of different coding strategies and algorithms has been proposed and several of them have been incorporated in international standards 1 2 . These coding strategies reduce the required bit rate by exploiting two main principles for bit-rate reduction. The first principle is the