Speech and audio coding patents: mapping who holds the claims and where they thin out
44.1% concentration. The five leading assignees together hold 3,560 of the 8,069 records in scope — a field with a genuine crowded core, not just a long tail. Annual filings reached 213 in 2017, the high point across the tracked period. Using the last complete comparison available, 2021 (134) to 2024 (100) shows a 25% decline. Years after 2024 are still filling in as publications catch up with filing dates, so the drop-off visible at the very end of the chart understates true recent activity rather than confirming a further decline.
- 1FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV15.5%
- 2QUALCOMM INC15.0%
- 3TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)5.5%
- 4NOKIA CORP4.4%
- 5NOKIA TECHNOLOGIES OY3.6%
See the full speech and audio coding analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about speech and audio coding patents
Who holds the most patents in speech and audio coding?
One assignee leads clearly with 1,254 records in this dataset, well ahead of the rest of the ranked field — fifth place sits at 294 and tenth place at 204. The leading names are a mix of legacy telecom equipment makers and dedicated codec specialists, reflecting decades of continuous filing around core speech-coding algorithms. Because the ranking counts records rather than a curated top list, it reflects filing volume, not necessarily current market share or technical superiority.
Is patent filing in speech and audio coding growing or shrinking?
Filing peaked in 2017 at 213 records and has eased since. The clearest comparable trend, using only complete filing years, is a 25% decline from 134 filings in 2021 to 100 in 2024. Years after 2024 currently show lower counts in the chart, but that reflects publication lag of roughly 18 months rather than an actual collapse in filing activity, so treat the very latest years as incomplete rather than conclusive.
What patent classes cover speech and audio codec technology?
The dominant class is G10L, speech and audio analysis/synthesis, appearing in 75.8% of the 8,069 records in scope. Secondary classes include H04L (digital information transmission, 17.3%), H04M (telephonic communication, 8.9%) and H03M (coding and code conversion, 7.9%), showing that codec inventions are usually filed alongside the transmission or device context they operate within rather than as isolated algorithm claims. A single record commonly carries several of these classes at once.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Speech and Audio Coding covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.