Audio Watermark Playback for Voice Command Confirmation
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Solution Overview
Problem
Conventional set-top boxes display voice commands on the TV screen, which is not intuitive and inconvenient for users.
Innovation Solution
An audio player with a watermark-based processing method that includes a receiver, analog-to-digital converter, processor, and transmitter to detect and embed watermarks in audio signals, ensuring user confirmation of voice commands through audible feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voice commands are displayed on TV screen for user confirmation, then user confirmation is achieved, but usability and intuitiveness deteriorate
Solution Approach 1:
The patent replaces the visual display mechanism (TV screen) with an acoustic feedback mechanism (audio output). The system embeds watermarks in audio signals and plays them back through speakers, allowing users to confirm voice commands through sound rather than visual display. This substitution improves ease of operation by providing more intuitive audio-based feedback.
Solution Approach 2:
The patent introduces an audio watermark as an intermediary carrier of confirmation information. Instead of directly displaying commands on screen, the system embeds watermark data in audio signals that are then played back. This intermediary audio watermark conveys confirmation information in an intuitive auditory form, resolving the contradiction between reliable confirmation and ease of operation.
2Reliability
If watermark detection and embedding processing is added, then command execution accuracy improves, but device complexity increases
Solution Approach 1:
The patent makes the existing audio processing components serve multiple functions. The audio processor not only handles normal audio playback but also performs watermark embedding and detection. The transmitter not only outputs audio signals but also embeds watermark information in the process. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while improving command execution accuracy.
3Ease of operation
If watermark embedding is performed in audio signals, then user feedback intuitiveness improves, but signal processing complexity increases
Solution Approach 1:
The patent merges the watermark embedding function with the existing audio signal processing pipeline. Instead of treating watermark embedding as a separate complex process, it is integrated into the audio transmission path where the audio processor embeds watermarks while simultaneously performing audio coding and compression. This merging approach provides intuitive audio feedback while minimizing the increase in signal processing complexity by utilizing existing processing infrastructure.
Data Source
AI summary
A watermark-based audio processing method for use in the audio player including a receiver, an analog-to-digital converter, a processor, a digital-to-analog converter and a transmitter includes: the receiver receiving an audio input signal, the analog-to-digital converter converting the audio input signal into a digital input signal including a keyword, the processor detecting an energy of the digital input signal, if the energy exceeds a threshold, the processor determining whether a watermark is included in the digital input signal, if not, the processor embedding the watermark into a predefined digital audio signal to generate a digital output signal, then the digital-to-analog converter converting the digital output signal into an audio output signal, and finally, the transmitter outputting the audio output signal for playback.