A Design on the Vector Processor of 2048point MDCT/IMDCT for MPEG-2 AAC
| Autor: | Dae-Sung Ku, Jong-Bin Kim, Jung-Hyun Yun |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Modified discrete cosine transform
business.industry Computer science Clock rate computer.file_format Sound recording and reproduction MPEG-2 Aliasing VHDL Discrete cosine transform Lapped transform Time domain Sound quality business computer Algorithm Computer hardware Data transmission computer.programming_language Data compression |
| Zdroj: | Lecture Notes in Computer Science ISBN: 9783540283201 ICNC (3) |
| DOI: | 10.1007/11539902_132 |
| Popis: | High Quality CD, and DAT audio is very data intensive. Currently, the multi-channel technique is the preferred method of audio transmission. The MPEG(Moving Picture Experts Group) provides data compression technology for sound and image systems. The MPEG-2 AAC standard provides multi-channel 5.1 sound, using the same audio algorithm as MPEG-1, thus MPEG-2 audio both forward and backward compatible. The MDCT(Modified Discrete Cosine Transform)is a linear orthogonal lapped transform based on the concept of TDAC(Time Domain Aliasing Cancellation). In this paper, we propose an efficient algorithm for the optimization of the core in the audio part of the data transmission based on the MDCT/IMDCT(Inverse MDCT). This algorithm reduced the operating coefficient by overlapped area to bind. In the comparison of the original algorithm with the optimized algorithm that cosine coefficient reduced 0.5%, multiplies operating 0.098% and adds operating 0.58%. The proposed Algorithm was implemented using the C language then we designed hardware architecture of micro-programmed method it's applied to optimized algorithm. This processor was designed with the VHDL language and was synthesized using the design analyzer of SYNOPSYS, with rule checking by SADAS. This processor operates at a clock frequency of 20MHz and a voltage of 5V. Thus, the designed system can be used for systems based on other FPGA and ASIC. |
| Databáze: | OpenAIRE |
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