Vehicle vision system with video compression

  • US 10,286,855 B2
  • Filed: 03/22/2016
  • Issued: 05/14/2019
  • Est. Priority Date: 03/23/2015
  • Status: Active Grant
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First Claim
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1. A multi-camera vision system of a vehicle, said multi-camera vision system comprising:

  • at least four cameras disposed at a vehicle and having respective fields of view exterior of the vehicle;

    wherein said at least four cameras comprises (i) at least one forward viewing camera having a field of view forward of the vehicle, (ii) at least one rearward viewing camera having a field of view rearward of the vehicle, (iii) at least one driver-side side viewing camera having a field of view sideward of the vehicle at the driver-side of the vehicle, and (iv) at least one passenger-side side viewing camera having a field of view sideward of the vehicle at the passenger-side of the vehicle;

    wherein each of said cameras comprises a pixelated imaging array having a plurality of photosensing elements;

    wherein each of said cameras is operable to capture image data within the respective field of view;

    wherein captured image data is compressed at the respective camera and wherein the compressed image data is communicated to a control unit;

    wherein said control unit comprises an image processor;

    wherein said image processor processes image data frame by frame using an indirect context model and without time wise dependency;

    wherein compressed image data is received at said control unit and decompressed before processing of image data by said image processor;

    wherein captured image data is compressed via a lossy video data compression and compressed image data is decompressed at said control unit via a decompression codec based on vector quantization using said indirect context model to select from available vectors; and

    wherein captured image data is compressed at a compression rate that depends on a selected vector length and color space.

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