  With advances in image recognition technology based on deep learning,
automatic video analysis by Artificial Intelligence is becoming more
widespread. As the amount of video used for image recognition increases,
efficient compression methods for such video data are necessary. In general,
when the image quality deteriorates due to image encoding, the image
recognition accuracy also falls. Therefore, in this paper, we propose a
neural-network-based approach to improve image recognition accuracy, especially
the object detection accuracy by applying post-processing to the encoded video.
Versatile Video Coding (VVC) will be used for the video compression method,
since it is the latest video coding method with the best encoding performance.
The neural network is trained using the features of YOLO-v7, the latest object
detection model. By using VVC as the video coding method and YOLO-v7 as the
detection model, high object detection accuracy is achieved even at low bit
rates. Experimental results show that the combination of the proposed method
and VVC achieves better coding performance than regular VVC in object detection
accuracy.
