Multi-description video encoding method of panoramic video

Abstract

The invention discloses a multi-description video encoding method of a panoramic video. The method comprises the following steps: (1) dividing the panoramic video into a plurality of airspace segmentsaccording to the size of a viewing angle of a receiving end device; (2) selecting the airspace segment containing an interested area of a user, coding the airspace segment, performing slice interleaving to generate two corresponding descriptions, and independently transmitting the two descriptions in the network; and (3) at a receiving end, separately decoding according to different conditions that a single description is received or the two descriptions are received at the same time. According to the multi-description video encoding method disclosed by the invention, the multi-description technology is used for coding the panoramic video, so that a part of the panoramic video required by the user can still be reconstructed in the case of partial description loss without requiring the retransmission of lost data packets, and the multi-description video encoding method provides a robust video transmission scheme, and not only satisfies the real-time communication needs, but also relieves the network congestion.

Description

technical field [0001] The invention relates to the field of panoramic video communication, in particular to a multi-description video encoding method for panoramic video. Background technique [0002] Panoramic video with high frame rate and high resolution is increasingly favored by users because it can provide users with a more realistic and immersive experience; at the same time, the demand for panoramic video communication is also increasing. Panoramic video communication has high requirements for transmission delay in order to provide users with an immersive experience. Compared with traditional video communication, the bit rate of panoramic video communication increases sharply; at the receiving end, due to the limitation of field of view, users only observe part of the content of panoramic video at the same time, instead of the entire panoramic video sequence. In panoramic video communication, panoramic video coding is one of the core technologies that determine sys...

AI Technical Summary

Problems solved by technology

However, there are still the following shortcomings: (1) The existing panoramic video coding schemes do not take into account the robustness of video transmission

In a best-effort network (such as the Internet) or an unreliable network, the bandwidth or delay required by the panoramic video communication service cannot be effectively guaranteed, especially real-time video that requires short delay and low packet loss rate communication

The transmission of video signals may result in severe packet loss due to limited bandwidth and time extension

Videos are all compressed. Because video compression usually uses motion prediction and motion compensation, data packet loss will not only affect the reconstruction of part of the video signal contained in the packet, but also spread to the rest of the same video sequence. , resulting in severe video reconstruction quality degradation

(2) Using the existing panoramic video coding scheme, when the video data packet is seriously lost, it is necessary to retransmit the video data packet

If data loss is due to network congestion, packet retransmissions can further exacerbate network congestion, resulting in more packet loss

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