Bluetooth LE Audio: Fundamental to Recent Advances

Bluetooth LE Audio: Fundamental to Recent Advances | Himanshu Bhalla, Oren Haggai
English | 2026 | PDF, EPUB | 153 pages | 20.1 MB

This book unravels the technical intricacies and recent developments of Bluetooth® LE Audio technology. Covering everything from the radio frequency model and LC3 Codec to application profiles and use cases, it provides a deep dive into the new architecture that is transforming wireless audio. It offers clear insights into the transition from Bluetooth Classic to LE Audio, emphasizing power efficiency, new features like Auracast broadcast audio, and the innovative potential of LE Audio in various devices.

• Provides a detailed look into all aspects of LE Audio, covering radio frequency models, logical links, transport layers, and the advantages of the LC3 Codec
  
• Explains the shift from Classic Audio to LE Audio, highlighting the advantages in power savings, efficiency, and new use cases enabled by Bluetooth® LE technology
  
• Breaks down the architecture of the LE Audio stack, from the Core Controller to Host protocols, profiles, and application interfaces, making it easier for developers to navigate the standard
  
• Explores cutting-edge features like Auracast broadcast audio for broadcasting audio content and synchronized audio streaming for multi-device setups, offering insights into future innovations in audio technology
  
• Emphasizes the potential for significant power savings with LE Audio, especially for devices with smaller batteries, allowing for longer usage without frequent charging
  

In the first three chapters, we will review audio in general, Bluetooth® in general, and the high-level architecture of LE Audio. The concepts that we will share with you in the first three chapters may sound familiar in some parts and may sound new in other parts. The purpose of the first three chapters is to focus on the motivation for LE Audio and what experience LE Audio is creating for users. This is the promise of LE Audio, which we hope to deliver to you. The following four chapters will go into more depth on the LE Audio concepts. You will learn more details about the various specifications of LE Audio and how these specifications apply to the LE Audio Architecture. We will review the protocols each of the specifications follows in order to deliver the LE Audio promise for new use cases. In the last chapter, we will take you back to the basics. We will illustrate to you use case examples from an application point of view and how the LE Audio orchestra of specifications is playing together to deliver a new type of interoperable user experience.

LE Audio is a large set of new specifications, which were developed by the Core and the Audio Working Groups in the Bluetooth SIG. With LE Audio, Bluetooth technology is addressing audio from a different perspective than the previous generation of audio over Bluetooth. The previous generation of Bluetooth audio is known as Classic Audio.

In Classic Audio, different audio use cases were addressed by different methods and defined in separate specifications. LE Audio uses generic methods to address all use cases. LE Audio grasps audio as a whole, addressing all existing use cases but without limiting the technology to a specific use case.
With LE Audio, use cases that were not possible with Classic Audio are now becoming possible. Because LE Audio is addressing audio using a uniform layered approach, future use cases can use the same architecture framework to build upon.

Many existing use cases will consume substantially less power as the radio duty cycle of audio over Bluetooth® LE is lower when compared with Bluetooth® Classic. In the Chapter 1, we will focus on the motivation behind LE Audio while providing a brief about the architecture. This chapter will also review the requirements from the perspective of various audio use cases and how these were addressed by Classic Audio and compare it to LE Audio.

This book is a must-read for developers and engineers seeking to master the latest advancements in Bluetooth technology.

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