Playback Queue Identification for Multi-Controller Access Control
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Solution Overview
Problem
Existing media playback systems face challenges in managing playback queues when multiple control devices interact, leading to conflicts and unintended overwriting of media content, which disrupts the intended playback experience.
Innovation Solution
Implementing application identifiers and queue identifiers in playback devices to manage interactions between control devices, ensuring that only authorized control applications can populate and manipulate playback queues, and providing feedback to control devices about queue ownership.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control devices are allowed to interact with the playback system, then the system's adaptability and ease of operation are improved, but conflicts and unintended overwriting of media content occur, worsening reliability
Solution Approach 1:
The patent segments the control authority by introducing application identifiers and queue identifiers that distinguish different control applications. Each application is assigned a unique identifier that allows the playback device to recognize and manage multiple control devices independently, preventing conflicts through structured identification and authorization mechanisms.
Solution Approach 2:
The patent implements feedback mechanisms where the playback device provides queue identifier information back to control devices. This feedback loop allows control devices to verify their authorization status and understand the current queue state, enabling them to adjust their behavior accordingly and prevent unintended overwriting operations.
2Ease of operation
If control devices can freely populate and manipulate playback queues, then ease of operation is improved, but unauthorized overwriting occurs, worsening reliability
Solution Approach 1:
The patent applies preliminary action by requiring control devices to obtain queue identifier information before manipulating playback queues. The system pre-establishes authorization relationships between applications and queues, and control devices must verify their authorization status before performing any queue operations, preventing unauthorized access in advance.
Solution Approach 2:
The patent introduces queue identifiers as an intermediary mechanism that mediates between control devices and playback queues. This intermediary element carries authorization information and enables the playback device to verify control device credentials, allowing flexible operation while maintaining security through the mediating identification system.
3Reliability
If application identifiers and queue identifiers are implemented to manage control device interactions, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing application identifiers and queue identifiers as multi-functional elements that serve multiple purposes: identification, authorization verification, and state tracking. These identifier mechanisms work across different control devices and playback queues universally, reducing the need for separate complex authorization systems for each device pair.
Data Source
AI summary
Example techniques relate to a playback device that facilitates queue identification. In an example implementation, a playback device receives, from a first controller, instructions representing a command to populate a playback queue with one or more first media items; the instructions are associated with a first application identifier corresponding to the first controller. Based on the received instructions, the playback device populates the playback queue with the one or more first media items and forms an association between the playback queue and the first application identifier. The playback device receives, from a second controller, instructions representing one or more first commands to access the playback queue; the instructions are associated with a second application identifier corresponding to the second controller. The playback device determines that the second application identifier is different from the first application identifier and denies the one or more first commands to access the playback queue.