LC3 / LC3plus Bluetooth LE Audio Codecs for Arm Cortex M55

Overview

One of the key characteristics of Bluetooth LE Audio is the new high performing standards-based LC3 audio codec. LE Audio requires the LC3 codec which supports scaling from 345kbps to just 16kbps while ensuring high-quality audio in both congested radio environments and at long distances. LC3 is both higher quality and more efficient than the SBC codec used in Classic Audio. LC3 aims to reduce dependency on proprietary codecs that supplemented SBC but don’t offer multi-vendor interoperability, which is necessary for applications like Auracast™ broadcast audio.

Packetcraft LC3 supports demanding audio use cases running multiple codec instances on a single processor, without requiring a dedicated DSP. LC3 is part of the overall LE Audio solution offered by Packetcraft, and when combined with Packetcraft Host and Packetcraft Controller, licensees receive a comprehensive, fully-integrated Bluetooth LE Audio solution from a single software supplier.

Packetcraft LC3 is highly optimized for Arm® Cortex® processors and can be used with your preferred Bluetooth SoC complemented with exceptional engineering support.

Also available is Packetcraft LC3 Tester, a companion test tool which allows the Packetcraft LC3 codec to be validated, characterized, and qualified on a target hardware platform.

Key Features

Bluetooth SIG Qualified
Production proven IP, extensively tested, commercially shipping
High-Quality Audio with LC3 Codec
7.5ms and 10ms frame lengths
All sample rates: 8, 16, 24, 32, 44.1, and 48kHz
Compressed bitrates: 16kbps-320kbps (10ms frame) / 21.3kbps-426.6kbps (7.5ms frame)
16, 24, and 32-bit input samples
Packet loss concealment (LC3 specification standard)
External rate control
Multiple instances of encoder and decoder
2.5ms and 5ms LC3plus frame lengths (optional add-on)

Benefits

Highly optimized for Arm® Cortex®-M4, M33, M55 and others as requested
CPU efficiency and performance delivering high-quality audio
Complete Bluetooth LC3 feature set for varied audio applications
Supports advanced LC3plus features for ultra-low latency
Bluetooth® qualified accelerates TTM

Block Diagram

Applications

Hearing aids
Earbuds & headsets
Microphone & speaker
Talking sensors
Audio source devices (tablet, camera, etc.)
Auracast™ broadcast audio infrastructure

Deliverables

API source code files
Codec full source code or object code library (license tier)
Make files
API documentation
User’s guide and release notes
Product Versions

Fixed point math optimized for Arm Cortex-M4 & M33
Fixed point math optimized for Arm Cortex-M55

Packetcraft LC3 is qualified to the Bluetooth LC3 specification v1.0.
Fully qualified and listed with the Bluetooth SIG, QDID is 175925.

Technical Specifications

Maturity

Commercial and Qualified

Availability

Shipping Now

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