Client-Side Adaptive Bitrate Patents: Buffer Occupancy Algorithms

It covers methods where a video player client measures how much video is currently buffered and uses that measurement, alone or combined with other signals, to decide the bitrate or timing of its next segment request. In this dataset that core idea sits mainly in IPC classes H04N and H04L, which together describe video pictorial communication and digital transmission. Claims range from simple threshold checks to more elaborate combinations with randomized timing, predicted throughput, or learned decision models, so the exact scope of any given patent depends heavily on what triggers the buffer-based decision and what the client does in response.

The assignee ranking returned by this dataset lists 19 companies, with the leader holding 36 of the 125 records in scope — meaning roughly three in ten records in this field trace to a single assignee. The top five combined account for 66.4% of all 125 records, and the top ten account for 88.0%, which is a strongly concentrated field rather than one with a long, even tail. Anyone entering this space should expect to run into the leading assignee's claims first, since they cover the largest single share of the prior art.

Filing activity peaked at 30 records in 2021 and had fallen to 5 by 2024, an 83% decline over that span, but this should not be read as the field going cold. Publication typically lags actual filing by about 18 months, so the 2025 and 2026 figures in this dataset are structurally incomplete and will rise as more applications publish. The more reliable read is that the field went through a filing surge around 2020–2021 and has since settled into a lower, still-active baseline rather than stopping.

The technology composition data shows video and transport classes (H04N, H04L) heavily claimed, while adjacent branches such as A63F (games/interactive playback), G01N (material or measurement analysis), G11B (storage media) and H04W (wireless network signalling) each account for only 2.4% to 3.2% of the 125 records. These lower-density branches represent combinations — buffer control tied to wireless link state, storage-tier awareness, or interactive playback contexts — that have far fewer prior filings to clear. That said, low density is not zero density, so a search against the specific assignees active in each branch is still necessary before drafting.

No. US9402114B2, assigned to Cisco Technology, Inc. and published 2016-07-26, claims a specific combination: checking whether buffer level is below a target and then applying a randomized delay before requesting the next segment, so that many clients' fetch times decorrelate from each other. It does not claim the general practice of using buffer occupancy to choose bitrate or timing. A client that uses a deterministic backoff, or that triggers timing changes from a different signal such as measured throughput, sits outside this specific claim's literal scope, though a full clearance should still review its dependent claims.