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A HEVC-based audio information embedding method and extraction and reconstruction method

An audio information and audio technology, which is applied in the field of HEVC-based audio information embedding, extraction and reconstruction, can solve the problem that the H.264/AVC standard cannot obtain satisfactory compression performance, and the audio and video synchronization processing effect of high-definition and ultra-high-definition videos is not good. Good and other questions

Active Publication Date: 2018-03-09
NINGBO UNIV
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Problems solved by technology

[0005] The above methods are mainly for standard-definition video, but with the increase of people's demand for high-definition and ultra-high-definition video, the H.264 / AVC standard can no longer obtain satisfactory compression performance. Poor video sync handling

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  • A HEVC-based audio information embedding method and extraction and reconstruction method

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] The invention provides an HEVC-based audio information embedding method and an HEVC-based audio information extraction and reconstruction method. The following first briefly introduces the HEVC video compression standard:

[0041] The HEVC video compression standard adopts a hybrid coding framework similar to H.264. The intra-frame coding uses a quadtree-based coding technology and multi-angle prediction technology. Unlike H.264 / AVC, the HEVC video compression standard uses a coding unit CU, prediction unit PU and change unit TU are three more flexible coding elements to describe the whole coding process. The coding unit CU is the basic unit of video coding for each frame. The size of the coding unit CU can be divided into 64×64, 32×32, 16×16, and 8×8 according to the depth of the quadtree recursively. In a code unit CU of a depth, it...

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Abstract

The invention relates to an HEVC-based audio information embedding method and an extraction and reconstruction method. In the audio information embedding part, the HEVC encoding and decoding structure is divided, and in the intra-frame predictive encoding process, a 4×4 image with high texture complexity is selected. The prediction unit uses the Lagrangian rate-distortion model to select the optimal prediction mode, and according to the correlation of adjacent prediction modes, on the premise that the optimal prediction mode is determined, the four prediction modes with similar prediction effects are divided into one group , establish a dynamic double-mapping relationship between the prediction mode group and the variable-length code group, change the flag bit according to the length of the audio information to be embedded, and corresponding to the modulation prediction mode, complete the embedding of audio 2-bit or 3-bit information, which greatly improves the The capacity of embedded audio information. In the extraction and reconstruction process, it is only necessary to decode the prediction mode in the code stream according to the double mapping relationship, realizing the complete and error-free embedding and extraction of audio information, and ensuring the subjective and objective quality of audio and video.

Description

technical field [0001] The invention relates to an HEVC-based audio information embedding method and an extraction and reconstruction method. Background technique [0002] With the development of digital multimedia communication and transmission technology, multimedia services such as video conferencing, distance learning, and video-on-demand have been widely used in all aspects of our lives. However, due to the delay, jitter and network congestion in network transmission, as well as the mismatch between the sending speed of the sending end and the receiving speed of the receiving end, the multimedia is out of sync, and audio and video synchronization, as a key technology, is becoming more and more more people's attention. In order to solve the audio and video synchronization problem, there are currently two types of methods, one is a non-embedded audio and video synchronization method, and the other is an embedded method. [0003] The traditional non-embedded audio and vi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/96H04N19/122H04N19/46H04N19/109H04N19/19H04N19/147H04N19/176
Inventor 王晓东徐辉王让定蒋刚毅章联军叶庆卫周宇汪朝林王含章陈超
Owner NINGBO UNIV
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