TAILIEUCHUNG - 41 Digital Audio Coding: Dolby AC-3

In order to more efficiently transmit or store high-quality audio signals, it is often desirable to reduce the amount of information required to represent them. | Davidson . Digital Audio Coding Dolby AC-3 Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton CRC Press LLC 1999 1999 by CRC Press LLC 41 Digital Audio Coding Dolby AC-3 Grant A. Davidson Dolby Laboratories Inc. Overview Bit Stream Syntax Analysis Synthesis Filterbank Window Design Transform Equations Spectral Envelope Multichannel Coding Channel Coupling Rematrixing Parametric Bit Allocation Bit Allocation Strategies Spreading Function Shape Algorithm Description Quantization and Coding Error Detection References Overview In order to more efficiently transmit or store high-quality audio signals it is often desirable to reduce the amount of information required to represent them. In the case of digital audio signals the amount of binary information needed to accurately reproduce the original pulse code modulation PCM samples may be reduced by applying compression algorithm. A primary goal of audio compression algorithms is to maximally reduce the amount of digital information bit-rate required for conveyance of an audio signal while rendering differences between the original and decoded signals inaudible. Digital audio compression is useful wherever there is an economic benefit realized by reducing the bit-rate. Typical applications are in satellite or terrestrial audio broadcasting delivery of audio over electrical or optical cables or storage of audio on magnetic optical semiconductor or other storage media. One application which has received considerable attention in the United States is digital television DTV . Audio and video compression are both necessary in DTV to meet the requirement that one high-definition DTV channel fit within the 6 MHz transmission bandwidth occupied by one preexisting NTSC analog channel. In December 1996 the United States Federal Communications Commission adopted the ATSC standard for DTV which is consistent with a consensus agreement developed

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.