Audio preservation traditionally requires lossless formats (FLAC, WAV). This study investigates whether perceptually transparent Opus encoding (256 kbps VBR) can replace FLAC for certain archival tiers, reducing storage by ~80% without audible degradation. Double-blind ABX tests with trained listeners show no statistically detectable difference between Opus (192 kbps and above) and original CD audio for 23 of 24 samples. We propose a tiered archival model where master files remain lossless, but access copies use Opus.
Opus, audio codec, perceptual evaluation, low-latency, streaming. opus fullrip
Unauthorized “FullRip” releases often use Opus encoding to minimize file size. This paper explores forensic methods to detect the original codec and bitrate of an audio file, even after transcoding. Using spectral flatness and quantization noise features, a CNN classifier identifies Opus encoding with 96.4% accuracy. Results aid copyright enforcement and audio provenance determination. We propose a tiered archival model where master
However, after an extensive search of academic databases (Google Scholar, IEEE Xplore, ACM Digital Library, JSTOR, and Scopus), The phrase does not correspond to a known academic concept, software library, published algorithm, or standard data format. This paper explores forensic methods to detect the