Meeting: TSGS4_135_India | Agenda Item: 7.8
[FS_ULBC] Analyzing semantic intelligibility in lossy coded audio signals
vivo Mobile Communication Co., Nokia, Xiaomi Technology, Samsung, Spreadtrum, Bytedance
pCR
Agreement
This document presents the results of an experimental evaluation focusing on the semantic intelligibility of audio codecs under Ultra-Low Speech Bitrate (ULBC) [1] constraints. While traditional quality metrics often focus on perceptual quality (MOS), the primary objective of this paper is to quantify semantic preservation (the ability of the listener to accurately understand the spoken content) using automatic speech recognition (ASR) word error rate (WER) as a proxy.
| TDoc | S4-260152 |
| Title | [FS_ULBC] Analyzing semantic intelligibility in lossy coded audio signals |
| Source | vivo Mobile Communication Co., Nokia, Xiaomi Technology, Samsung, Spreadtrum, Bytedance |
| Agenda item | 7.8 |
| Agenda item description | FS_ULBC (Study on Ultra Low Bitrate Speech Codec) |
| Doc type | pCR |
| For action | Agreement |
| Abstract | This document presents the results of an experimental evaluation focusing on the semantic intelligibility of audio codecs under Ultra-Low Speech Bitrate (ULBC) [1] constraints. While traditional quality metrics often focus on perceptual quality (MOS), the primary objective of this paper is to quantify semantic preservation (the ability of the listener to accurately understand the spoken content) using automatic speech recognition (ASR) word error rate (WER) as a proxy. |
| Release | Rel-20 |
| Specification | 26.94 |
| Version | 0.4.0 |
| Related WIs | FS_ULBC |
| download_url | https://www.3gpp.org/ftp/tsg_sa/WG4_CODEC/TSGS4_135_India/Docs/S4-260152.zip |
| For | Agreement |
| Spec | 26.94 |
| Type | pCR |
| Contact | Wang Dong |
| Uploaded | 2026-02-03T13:43:09.937000 |
| Contact ID | 107237 |
| TDoc Status | noted |
| Reservation date | 03/02/2026 12:33:20 |
| Agenda item sort order | 20 |