METHODS AND SYSTEMS FOR RENDERING OBJECT BASED AUDIO

Smart overview of the Invention

Overview: The patent application describes methods and systems for generating and rendering object-based audio programs. These programs are unique in their ability to be personalized by users, providing an immersive audio experience. A key feature is the inclusion of a "bed" of speaker channels that can deliver a complete audio experience even without user-selected content. This system allows for the integration of multiple audio object channels, which users can select and configure to enhance their listening experience.

Technical Field: The invention is situated in the field of audio signal processing, focusing on the encoding, decoding, and interactive rendering of audio data bitstreams. These bitstreams contain both audio content and metadata that facilitate interactive rendering. The patent specifically mentions compatibility with formats like Dolby Digital (AC-3), Dolby Digital Plus (E-AC-3), and Dolby E, which are standard in the industry for high-quality audio encoding and rendering.

Background: Dolby Laboratories' proprietary audio formats, such as AC-3 and E-AC-3, provide the foundation for the audio encoding described in the patent. These formats are known for their efficient compression and high-quality audio output. The patent details how audio bitstreams contain both compressed audio data and metadata, allowing for dynamic adjustments to the audio program. This includes parameters like DIALNORM, which affects audio levels based on metadata embedded within the bitstream.

Innovation in Rendering: The patent introduces innovative methods for rendering object-based audio programs, which assume flexible speaker arrangements in the playback environment. Metadata within the program guides the rendering of audio objects in three-dimensional space, creating an immersive experience. Users can select and configure audio objects, allowing for a personalized listening experience that can adapt to different environments and preferences.

User Interactivity: The system allows significant user interaction with audio content, offering options to select and mix audio objects within the program. This includes choosing different sound sources and adjusting playback levels, enhancing the personalization of the audio experience. Metadata provides a menu of rendering options, enabling users to customize their listening experience through a user-friendly interface, typically connected to a set-top device or similar equipment for decoding and rendering the audio program.