ĐÁNH GIÁ ĐỘ TRỄ TRUYỀN TẢI VIDEO THỜI GIAN THỰC TỪ HỆ THỐNG QUAN TRẮC HÌNH ẢNH TỪ XA

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Tác giả: Xuân Lâm Đinh, Mạnh Dũng Đỗ, Thị Phượng Đỗ, Toàn Thắng Nguyễn, Chí Đông Võ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2023

Mô tả vật lý: tr.135 - 143

Bộ sưu tập: Metadata

ID: 340233

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Sự ra đời của cuộc cách mạng công nghiệp 4.0 cùng với sự phát triển bùng nổ của các công nghệ tiến tiến như IoT (Internet of Things) đã giải quyết phần lớn các nhu cầu thiết yếu của một xã hội số đang không ngừng thay đổi. Một trong số đó là các hệ thống quan trắc môi trường bằng hình ảnh từ xa. Bài báo này trình bày một hệ thống quan trắc như vậy bao gồm các thiết bị nhỏ gọn như Raspberry Pi. Hệ thống này được lắp ghép và lập trình để có thể truyền được hình ảnh hoặc video từ môi trường thông qua mạng Internet đến các thiết bị đầu cuối của người dùng. Để truyền được video từ trạm quan trắc đến thiết bị đầu cuối, các giao thức truyền tải video phổ biến lần lượt được thử nghiệm trong thực tế như HLS, DASH, RTMP và RTSP. Kết quả cho thấy có sự khác biệt về độ trễ truyền tải video giữa các giao thức này thông qua các kịch bản thí nghiệm khác nhau. Cụ thể, nhóm giao thức dựa trên HTTP như HLS và DASH có độ trễ truyền tải cao hơn nhóm giao thức RTMP và RTSP và cao hơn hẳn độ trễ mã hóa video tại thiết bị IoT. Nguyên nhân chính đến từ sự khác nhau về kỹ thuật truyền video thời gian thực và công nghệ mã hóa video giữa các giao thức trên.The advent of the industrial revolution 4.0 and the explosive development of advanced technologies such as IoT (Internet of Things) have solved most of the essential needs of a constantly changing digital society. One of those is the environmental video surveillance system. This paper presents such a system including compact devices such as Raspberry Pi. This system is assembled and programmed to be able to transmit images or videos from the environment area via the Internet to the user's end devices. In order to transmit video from the surveillance system to the user's end devices, the most popular video transmission protocols are tested in practice, such as HLS, DASH, RTMP, and RTSP. As a result, a difference in video transmission latency between these protocols through different experimental scenarios was found. In particular, the HTTP-based protocol group such as HLS and DASH has higher transmission latency than RTMP and RTSP and much higher than the latency of video encoding at IoT devices. The main reason comes from the different streaming video and video encoding techniques between the above protocols.

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