Reducing lane departure warning false alarms
AssigneeAmbarella, Inc.
InventorShimon Pertsel
Life of this patent
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Abstract
An apparatus includes a video processing circuit, an audio generating circuit, and an analysis circuit. The video processing circuit may be configured to analyze a video signal to detect lane markings and to detect departure of a vehicle from a lane bounded by the lane markings. The audio generating circuit may be configured to present a lane departure warning to a driver. The analysis circuit may be configured to determine whether a lane departure detected by the video processing circuit is intentional and generate the lane departure warning in response to an unintended lane departure.
Claims20
An apparatus comprising:
- a video processing circuit;
- an audio generating circuit;
- and
- an analysis circuit, wherein (a) said video processing circuit is configured to analyze a video signal to detect lane markings and to detect departure of a vehicle from a lane bounded by the lane markings, (b) said audio generating circuit is configured to present a lane departure warning to a driver of the vehicle, and (c) the analysis circuit is configured to (i) determine whether a lane departure detected by the video processing circuit is intentional based on at least one of said video processing circuit detecting an activated turn signal indicator through analysis of video data from said video signal and an audio processing circuit detecting said activated turn signal indicator through analysis of audio data collected from within a passenger compartment of the vehicle, wherein detecting said activated turn signal indicator through analysis of said audio data comprises detecting a ticking sound attributable to operation of said turn signal indicator by performing a spectrographic analysis to detect pulses with a higher than average energy content, (ii) inhibit the lane departure warning in response to an intended lane departure, and (iii) generate the lane departure warning in response to an unintended lane departure.
A method of reducing lane departure warning false alarms comprising the steps of:
- detecting a lane departure using at least one of a dash camera or a vehicle camera system;
- determining whether said lane departure is intentional by detecting an activated turn signal indicator through at least one of (i) analysis of video data from a video signal from said dash camera or said vehicle camera system or (ii) analysis of audio levels collected from within a passenger compartment of the vehicle, wherein determining whether said lane departure is intentional further comprises detecting a ticking sound attributable to operation of said turn signal indicator by performing a spectrographic analysis to detect pulses with a higher than average energy content;
- if said lane departure is unintentional, warning a driver of said lane departure;
- and
- if said lane departure is intentional, inhibiting said lane departure warning.
A method of improving driver behavior comprising:
- tracking lane departures and turn signal use during a trip using a vehicle camera system or a dash camera, wherein lane departures and activated turn signal indicators are detected through analysis of video data from said vehicle camera system or said dash camera, or said activated turn signal is detected through analysis of audio data collected from within a passenger compartment of the vehicle, said analysis of said audio data comprising detection of a ticking sound attributable to operation of said turn signal indicators by performing a spectrographic analysis to detect pulses with a higher than average energy content;
- and
- providing feedback to a driver regarding said turn signal use in relation to said lane departures when said trip ends.
Dependencies are inferred from the claim text.