H04N 19/30 - Definition fr

Definition statement

This subclass covers:

Details of video coding, where the elementary video stream is coded so that it contains a hierarchy of different compressed representations of the same video sequence, wherein each representation may correspond e.g. to a different video resolution or video format. Layered coding is also covered here.

The hierarchy may be incremental, as e.g. in scalable video coding (like the extension of the standard H.264 called Scalable Video Coding [SVC]).

References relevant to classification in this subclass

This subclass does not cover:

Transform coding using sub-band based transform, e.g. wavelets

H04N 19/63

Informative references

Attention is drawn to the following places, which may be of interest for search:

Processing of video elementary streams in the server involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements, e.g. by decomposing video signals into layers at the transmitter side

H04N 21/2343

Controlling the complexity of the video stream at the transmitter side, e.g. by scaling the resolution or bitrate of the video stream

H04N 21/2662

Processing of video elementary streams in the client device involving reformatting operations of video signals for household redistribution, storage of real-time display, e.g. by decomposing video signals into layers at the receiver side

H04N 21/4402

Content or additional data management, e.g. controlling the complexity of the video stream at the receiver side

H04N 21/462

Glossary of terms

In this subclass, the following terms or expressions are used with the meaning indicated:

Temporal scalability

Scalability in terms of frame rate, meaning that a given bit stream includes different sub-streams each with a different frame rate or sub-streams that, when combined, increase the output frame rate.

Spatial scalability

Scalability in terms of spatial video sampling rate or resolution (e.g. quantisation step size, pixel bit depth), meaning that a given bit stream includes different sub-streams each with a different frame size or resolution or sub-streams that, when combined, increase the output frame size or resolution.