 Digital Signal Processing Solutions Tools: Audio Algorithms | |
| Product Name: | MPEG Audio Compression Algorithm |
| Company Name: | Stradis, Inc. |
| Features & Benefits: |
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| TMS320 Devices Supported: | C3x |
| Sampling Rate (kHz): | 32-48 |
| Program Memory (k word): | 6.4 |
| Data Memory (k word): | 18 |
| Processor Loading (MIPS): | 'C30, 'C31, or 'C32 |
| Target Platform: | 40MHz 'C30 or 'C31 |
| Hardware Requirements: | 50 MHz 'C32 |
| Word Size: | 32 bits |
| Group Delays: | NA |
| Technical Support/Training Available: | YES 7. Custom engineering services available |
| Overview: | The MPEG (Moving Pictures Expert Group) Audio Compression Algorithm provides high quality audio coding for mono and stereo signals and is well suited for audio applications in broadcasting, home entertainment, multimedia and telephony. MPEG audio is a subband algorithm with adaptive quantization. An MPEG encoder divides the incoming audio signal first by frequency into 32 subband channels, then by time into frames of approximately 8 or 24 milliseconds in length. A psychoacoustic model estimates the ear's sensitivity to quantization noise in each frame and subband. Using this information the quantization level for each is chosen to produce the best subjective sound quality within the total available transmission bandwidth. The quantization information is also sent along with the encoded samples of each subband to the decoder, which performs the inverse operations to reconstruct the signal. |
| Ideal Performance: | |
| Algorithm Verification: | There are no ISO/IEC test vectors for MPEG audio. However, this algorithm has been used in thousands of systems and is currently in use in satellite uplink transmitters, CATV local ad insertion systems, terrestrial digital video network systems, and radio and television station equipment around the world. |
| Availability: | Available now! |
| Operating System Used: | N.A. |
| Tools Supported By: | N.A. |
| Company Information: | Stradis, Inc. 3170 Sugarplum Road, NE Atlanta GA 30345-1553 USA Tel: 770-621-0625 Fax: 770-621-0310 e-mail: support@stradis.com www:  http://www.stradis.com |
| Stradis provides compression technology for digital audio and video systems. | |
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