AI 中文总结
针对实时无线应用中无损与有损编码无缝切换的需求，提出基于时域混叠消除（TDAC）且与Opus CELT模式重叠匹配的无损编解码器OLAC，实现无中断切换且保持最先进压缩性能。
AI 中文摘要
无损音频编码是一个高度成熟的研究领域，在纯压缩性能方面取得重大改进的潜力有限。然而，新兴的实时无线应用越来越需要在有损和无损编码之间进行动态切换，以适应波动的网络容量。现有的独立无损编解码器无法实现这种无缝切换，而不产生中断。在本文中，我们提出了一种基于时域混叠消除（TDAC）的无损编解码器，它可以匹配Opus编解码器CELT模式中的重叠。这使得有损和无损编码之间的转换可以在不中断或不传输冗余信息的情况下实现。我们表明，所提出的编解码器仍然实现了最先进的无损压缩，而不因其使用TDAC而受到惩罚。
英文摘要
Lossless audio coding is a highly mature field of research, with limited potential for significant improvements in pure compression performance. However, emerging real-time wireless applications increasingly require dynamic transitions between lossy and lossless coding to adapt to fluctuating network capacities. Existing standalone lossless codecs cannot achieve this seamless switching without discontinuity. In this paper, we propose a lossless codec based on time-domain aliasing cancellation (TDAC) that can match the overlap in the CELT mode of the Opus codec. This allows the transition between lossy and lossless coding to be achieved without discontinuity or the transmission of redundant information. We show that the proposed codec still achieves state-of-the-art lossless compression without being penalized by its use of TDAC.
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