J1’s glueless burst memory interface which The J1 is a core celldesign of an application specific signal processor which performs both Dolby AC-3 and MPEG audio decompression in a single design. The J1 is capable of decoding all AC-3 bitstreams with full support for bitstreams encoded with 5.1 channels and data rates of up to 640kb/s. The J1 downmixing capability produces stereo output in either normal or Pro-Logic compatible modes, making it ideal for DVD and set-top applications. For MPEG operation, J1 produces stereo output from either MPEG-1 or MPEG-2 audio bitstreams. The J1 audio quality meets the highest standards, allowing it to be used for the most demanding audio applications. The 20-bit PCM output yields Dolby “Group A” performance for AC-3, and conforms to the highest audio quality level specified by ISO11172-4 for MPEG bitstreams.
Dolby Digital/AC-3/MPEG Audio Decoding Core
Overview
Key Features
- Decodes 5.1 Dolby Digital/AC-3 (ATSC A/52)
- Decodes MPEG layers 1 & 2 (ISO11172)
- 20 bit stereo PCM output
- Dolby Group A conformance.
- Support for DVD and SPDIF
- Supports DRAM sharing
- Low cost three block architecture
- Downmixes to Normal/Pro-Logic Stereo
Benefits
- The J1 silicon implementation has been granted Dolby Digital Certification by Dolby Laboratories for sales to Dolby Laboratories Licencing Corporation Licensees
Block Diagram
Technical Specifications
Short description
Dolby Digital/AC-3/MPEG Audio Decoding Core
Vendor
Vendor Name
Availability
now