FFT Codec Phase Reuse for Narrow-Band Data Transport
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Solution Overview
Problem
Current multimedia codecs based on FFT ignore phases, leading to inefficient use of bandwidth and increased power consumption in high-speed communications, particularly in OFDM systems where available frequency ranges are scarce.
Innovation Solution
Reintroducing phases to group local peaks and transport data in the phases between multimedia frames, allowing for narrow bandwidth communications by using inverse FFT in the time domain, and applying techniques similar to OFDM or F-OFDM for high-speed support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If phases are ignored in FFT-based multimedia codecs, then bandwidth consumption is reduced and processing is simplified, but communication efficiency deteriorates and power consumption increases
Solution Approach 1:
The patent extracts and separately processes the phase information from the complex FFT coefficients. By isolating the phase component, the system can selectively utilize it for data transport without requiring full complex number processing, thereby reducing overall computational complexity and power consumption while maintaining communication efficiency.
Solution Approach 2:
The phase information serves multiple functions: it carries displacement data for peak positioning and simultaneously transports additional data between multimedia frames. This multi-functionality allows the system to achieve both efficient compression and enhanced data transport capabilities without proportionally increasing power consumption.
2Quantity of substance
If phases are used to transport data between multimedia frames, then bandwidth is reduced and data transport capacity is increased, but system complexity increases
Solution Approach 1:
The patent segments the FFT coefficient information into magnitude and phase components, with the phase component specifically designated for data transport. This segmentation allows the system to leverage existing phase information from compression operations without requiring completely new processing architectures, thereby increasing data capacity while limiting complexity growth.
Solution Approach 2:
The patent utilizes the phase dimension of complex FFT coefficients as an additional data transport channel. By exploiting this previously underutilized dimension, the system increases data capacity without adding proportional hardware complexity, as the phase information is already present in the standard FFT output.
3Loss of energy
If local peaks are grouped with narrow bandwidth, then communication range is reduced, but power consumption is reduced and selectivity is improved
Solution Approach 1:
The patent applies local quality by grouping only the most significant local peaks with narrow bandwidth while maintaining other frequency components with broader bandwidth. This selective approach concentrates power into specific narrow bands for low-power communication while preserving overall communication range through the distributed nature of the peak groups across the frequency spectrum.
Data Source
AI summary
Multimedia codecs (compression methods), based only on FFT (Fast Fourier Transform) have been recently proposed. These codecs use the largest points (foreground) and the most energetic bands (background). Medium quality versions are based on the largest local peaks only.The phases can be ignored with the largest local peaks or in the background. Alternatively, sine and cosine amplitudes can be used.This invention describes methods for giving utility to the reintroduced phases, in particular: local peaks are grouped to have a very narrow bandwidth, with the phases containing the displacements of these peaks, and we transport data and the points of the foreground in the phases of the background.High speed communications are supported using techniques similar to OFDM (Orthogonal Frequency-Division Multiplexing). These processes are intended to be used in particular with connected objects and in the physical layers of computer networks.