Stereo Audio Decoding with Single-Channel Reconstruction
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Solution Overview
Problem
Existing audio decoding technologies face challenges in reducing power consumption, particularly in devices with limited resources such as Bluetooth headsets and smart speakers.
Innovation Solution
The proposed solution involves an audio decoding method that determines a channel decoding mode based on specific conditions, such as the audio signal being dual-channel, meeting bit rate and sampling rate thresholds, and then either decoding both channels or duplicating data from one channel to the other, thereby reducing the decoding workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dual-channel audio signals are decoded using traditional methods, then audio quality is maintained, but power consumption increases and processing complexity increases
Solution Approach 1:
The patent applies partial action by selectively decoding only one channel (left or right) when the audio signal is stereo and both channels are identical or highly correlated. Instead of decoding both channels fully, the decoder reconstructs the second channel by copying or mirroring the decoded channel, thereby reducing processing operations and power consumption while maintaining perceived audio quality for many playback scenarios.
Solution Approach 2:
The patent implements copying by creating a duplicate of the decoded channel data to reconstruct the second channel. When the left channel is decoded, the right channel is generated by copying and potentially mirroring this data, eliminating the need for separate decoding operations and reducing overall processing requirements while preserving stereo output capability.
2Device complexity
If dual-channel audio signals are decoded using traditional methods, then complete audio data is obtained, but device complexity increases
Solution Approach 1:
The patent reduces device complexity by performing partial decoding operations. Instead of fully decoding both channels through complex processing, the system decodes one channel completely and generates the other channel through simpler copying and mirroring operations, significantly reducing the decoding workload and computational requirements.
Solution Approach 2:
The patent simplifies device complexity by using copying mechanisms to reconstruct the second audio channel from the first decoded channel. This approach replaces complex dual-channel decoding with simpler single-channel decoding plus data replication, reducing processing complexity while maintaining functional audio output.
3Use of energy by moving object
If channel decoding mode is optimized based on audio signal characteristics, then power consumption is reduced, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by analyzing audio signal characteristics (such as channel correlation and signal type) before initiating the decoding process. Based on this preliminary analysis, the decoder selects the appropriate decoding mode (full dual-channel decoding or simplified single-channel decoding with copying), enabling power optimization without requiring complex real-time adjustments during decoding.
Solution Approach 2:
The patent implements dynamic adaptation by adjusting the decoding strategy based on the characteristics of the input audio signal. The system dynamically selects between different decoding modes (full decoding or copy-based reconstruction) depending on whether the signal is mono, stereo, or has high channel correlation, allowing power consumption to be optimized adaptively without fixed complex processing for all cases.
Data Source
AI summary
This disclosure discloses an audio encoding/decoding method and apparatus, a storage medium, and a computer program product, and belongs to the audio encoding/decoding field. In this solution, when an audio signal is a dual-channel signal, even if a bitstream includes a left-channel bitstream and a right-channel bitstream, based on a channel decoding mode, the left-channel bitstream is decoded but the right-channel bitstream is not decoded, or the right-channel bitstream is decoded but the left-channel bitstream is not decoded in a decoding process. Therefore, power consumption at a decoder side is reduced when resources at the decoder side are limited. Correspondingly, an encoder side can also sequentially encode left-channel data and right-channel data based on a condition met by the audio signal, rather than necessarily performing encoding in a dual-channel interleaving encoding scheme or a dual-channel deinterleaving encoding scheme.