IP Library › Granted Patent US 12,593,054
Granted Patent B2
US 12,593,054 · App. 18/354,448 · Granted Mar 31, 2026

Low delay concept in multi-layered video coding

Inventors: Karsten Suehring (Berlin, DE); Thomas Schierl (Berlin, DE); Detlev Marpe (Berlin, DE); Robert Skupin (Berlin, DE); Yago Sanchez De La Fuente (Berlin, DE); Gerhard Tech (Berlin, DE)
Assignee: Dolby Video Compression, LLC
H04N19/30H04L69/324H04N19/119H04N19/166H04N19/174H04N19/187H04N19/33H04N19/423H04N19/44H04N19/50H04N19/593H04N19/65H04N19/66H04N19/70H04N19/85H04N19/89H04N19/91
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Quick Facts
Patent No.
US 12,593,054
App. No.
18/354,448
Granted
Mar 31, 2026
Kind
B2
Abstract

An interleaved multi-layered video data stream with interleaved decoding units of different layers is provided with further timing control information in addition to the timing control information reflecting the interleaved decoding unit arrangement. The additional timing control information pertains to either a fallback position according to which all decoding units of an access unit are treated at the decoded buffer access unit-wise, or a fallback position according to which an intermediate procedure is used: the interleaving of the DUs of different layers is reversed according to the additionally sent timing control information, thereby enabling a DU-wise treatment at the decoder's buffer, however, with no interleaving of decoding units relating to different layers. Both fallback positions may be present concurrently. Various advantageous embodiments and alternatives are the subject of the various claims attached herewith.

Claims (31)

1 . A decoder comprising a processor configured to decode a multi-layered video data stream that includes encoded video content represented in a plurality of layers, the multi-layered video data stream including a sequence of network abstraction layer (NAL) units, which are divided into a sequence of access units,

wherein each access unit includes a plurality of decoding units, with each decoding unit of the plurality of decoding units having at least one NAL unit corresponding to one layer of the plurality of layers, wherein the multi-layered video data stream includes:

first timing control information signaling a first decoder buffer retrieval time for an access unit from the sequence of access units; and

second timing control information, separate from the first timing control information, signaling a second decoder buffer retrieval time for each decoding unit of a particular access unit according to a particular order of the respective decoding unit in the multi-layered video data stream.

2 . The decoder of claim 1 , wherein the multi-layered video data stream includes third timing control information signaling a third decoder buffer retrieval time for each decoding unit of a particular access unit according to a layer order defined for the plurality of layers, wherein in accordance with the layer order, within an access unit, a first decoding unit associated with a first layer precedes a second decoding unit associated with a second layer that succeeds the first layer based on the layer order.

3 . The decoder of claim 2 , wherein decoding units associated with different layers of the plurality of layers are interleaved in the multi-layered video data stream.

4 . The decoder of claim 3 , wherein the processor is configured to, in emptying a decoder buffer in units of access units, remove decoding units of the access units, by de-interleaving, in accordance with the layer order.

5 . The decoder of claim 1 , further comprising a plurality of buffers, each buffer of the plurality of buffers for storing decoding units of one layer of the plurality of layers, and the processor is configured to, for each layer, buffer the decoding units including NAL units associated with the respective layer in the corresponding buffer for the respective layer.

6 . The decoder of claim 1 , further comprising a plurality of buffers, each buffer of the plurality of buffers for storing decoding units of a subset of layers of the plurality of layers, and the processor is configured to, for each layer, buffer the decoding units including NAL units associated with the respective layer in the corresponding buffer for the subset of layers to which the respective layer belongs.

7 . The decoder of claim 2 , wherein the processor is configured to:

empty a decoder buffer for buffering the multi-layered data stream in units of access units based on the first timing control information,

responsive to the second timing control information, empty a decoder buffer for buffering the multi-layered data stream in units of the decoding units according to the particular order based on the second decoder buffer retrieval time, and

responsive to the third timing control information, empty a decoder buffer for buffering the multi-layered data stream in units of the decoding units according to the layer order based on the third decoder buffer retrieval time.

8 . The decoder of claim 1 , wherein the second timing control information is decoded independent of the first timing control information.

9 . An encoder comprising a processor configured to encode video content into a plurality of layers of a multi-layered video data stream, the multi-layered video data stream including a sequence of network abstraction layer (NAL) units, which are divided into a sequence of access units,

wherein each access unit includes a plurality of decoding units, with each decoding unit of the plurality of decoding units having at least one NAL unit corresponding to one layer of the plurality of layers,

wherein the encoder is configured to encode first timing control information and second timing control information into the multi-layered video data stream,

the first timing control information signaling a first decoder buffer retrieval time for an access unit from the sequence of access units,

the second timing control information, separate from the first timing control information, signaling a second decoder buffer retrieval time for each decoding unit of a particular access unit according to a particular order of the respective decoding unit in the multi-layered video data stream.

10 . The encoder of claim 9 , wherein the multi-layered video data stream includes third timing control information signaling a third decoder buffer retrieval time for each decoding unit of a particular access unit according to a layer order defined for the plurality of layers, wherein in accordance with the layer order, within an access unit, a first decoding unit associated with a first layer precedes a second decoding unit associated with a second layer that succeeds the first layer based on the layer order.

11 . The encoder of claim 10 , wherein decoding units associated with different layers of the plurality of layers are interleaved in the multi-layered video data stream.

12 . The encoder of claim 9 , wherein the second timing control information is encoded independent of the first timing control information.

13 . A method for encoding video content into a plurality of layers of a multi-layered video data stream, the multi-layered video data stream including a sequence of network abstraction layer (NAL) units that are divided into a sequence of access units, comprising:

encoding first timing control information and second timing control information into the multi-layered video data stream, wherein:

each access unit includes a plurality of decoding units, with each decoding unit of the plurality of decoding units having at least one NAL unit corresponding to one layer of the plurality of layers,

the first timing control information signals a first decoder buffer retrieval time for an access unit from the sequence of access units, and

the second timing control information, separate from the first timing control information, signals a second decoder buffer retrieval time for each decoding unit of a particular access unit according to a particular order of the respective decoding unit in the multi-layered video data stream.

14 . The method of claim 13 , wherein the multi-layered video data stream includes third timing control information signaling a third decoder buffer retrieval time for each decoding unit of a particular access unit according to a layer order defined for the plurality of layers, wherein in accordance with the layer order, within an access unit, a first decoding unit associated with a first layer precedes a second decoding unit associated with a second layer that succeeds the first layer based on the layer order.

15 . The method of claim 14 , wherein decoding units associated with different layers of the plurality of layers are interleaved in the multi-layered video data stream.

16 . The method of claim 13 , wherein the second timing control information is encoded independent of the first timing control information.

17 . A method for storing a data stream, comprising storing, on a digital storage medium, a multi-layered video data stream having video content encoded therein as a plurality of layers by a method according to claim 13 .

Assignments (1)
CHANGE OF NAME Recorded Nov 26, 2024
From: GE VIDEO COMPRESSION, LLC
To: DOLBY VIDEO COMPRESSION, LLC
Reel/Frame 069450/0772 →
Continuity (6)
Continuation 17241891 · Apr 27, 2021
Continuation 16552342 · Aug 27, 2019
Continuation 14995430 · Jan 14, 2016
Continuation PCTEP2014065185 · Jul 15, 2014
Provisional Application 61846479 · Jul 15, 2013
Related Publication 20240129499A1 · Apr 18, 2024
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