Systems and methods for signaling of video parameters and information associated with caption services

Patent metadata

Field	Value
Publication number	US-2018249167-A1
Application number	US-201615756154-A
Country	US
Kind code	A1
Filing date	Sep 2, 2016
Priority date	Sep 4, 2015
Publication date	Aug 30, 2018
Grant date	—

Abstract

A method for signaling video parameters associated a video asset included in a multimedia presentation, the method comprising: signaling a flag indicating whether picture rate information is present in a descriptor associated with the video asset; and signaling picture rate information for one or more layers of encoded video data corresponding to the video asset based on the flag, wherein picture rate information includes a code value indicating a picture rate value.

First claim

1 . A method for signaling video parameters associated a video asset included in a multimedia presentation, the method comprising:
signaling a flag indicating whether picture rate information is present in a descriptor associated with the video asset; and signaling picture rate information for one or more layers of encoded video data corresponding to the video asset based on the flag, wherein picture rate information includes a code value indicating a picture rate value.

2 . The method of claim 1 , wherein a code value of 6 indicates a picture rate value of 60 Hertz and wherein a code value of 11 indicates a picture rate value of 120 Hertz.

3 . The method of claim 2 , wherein a code value of 255 indicates that a picture rate value is indicated using a syntax element indicating an average picture rate in units of pictures per 256 second.

4 . The method of claim 1 , further comprising signaling a flag indicating whether temporal scalability information is present in the descriptor associated with the video asset and signaling a maximum number of temporal sub-layers corresponding to the video asset based on the flag indicating whether temporal scalability information is present.

5 . The method of claim 4 , further comprising signaling a flag indicating whether information for temporal sub-layers in the video asset is present based on the flag indicating whether temporal scalability information is present.

6 . The method of claim 1 , wherein the descriptor associated with the video asset is identified as a video descriptor using a descriptor tag value.

7 . The method of claim 1 , wherein the video asset is transported using a unidirectional physical layer.

8 . A device for rendering a video asset included in a multimedia presentation, the device comprising one or more processors configured to:
receive a descriptor associated with a video asset; parse a flag indicating whether picture rate information for the video asset is present in the descriptor; parse picture rate information corresponding to the video asset based on the flag indicating picture rate information is present in the descriptor; and determine a picture rate corresponding to the video asset based on a code value indicating a picture rate value.

9 . The device of claim 8 , wherein determining a picture rate corresponding to the video asset based on a code value indicating a picture rate value includes determining a picture rate value of 60 Hertz for a code value of 6 and determining a picture rate value of 120 Hertz for code value of 11.

10 . The device of claim 9 , wherein determining a picture rate corresponding to the video asset based on a code value indicating a picture rate value includes determining a picture rate value of 50 Hertz for a code value of 8.

11 . The device of claim 8 , wherein the one or more processors are further configured to parse a flag indicating whether temporal scalability information is present in the descriptor;
parse a syntax element indicating a maximum number of temporal sub-layers corresponding to the video asset based on the flag indicating whether temporal scalability information is present.

12 . The device of claim 8 , wherein the one or more processors are further configured to
parse a flag indicating whether color information is present in the descriptor; and parse a flag indicating whether bit rate information is present in the descriptor.

13 . The device of claim 8 , wherein the one or more processors are further configured to
parse a flag indicating whether scalability information is present in the descriptor.

14 . The device of claim 8 , wherein the one or more processors are further configured to receive the video asset using a unidirectional physical layer.

15 . A method for determining one or parameters of a video asset included in a multimedia presentation, the method comprising:
receiving a descriptor associated with a video asset; parse one or more flags indicating whether a type of information for the video asset is present in the descriptor, wherein the one or more flags include a temporal scalability information present flag, a scalability information present flag, a multi-view information present flag, a picture quality present flag, picture rate information present flag, a bit rate information flag and a color information present flag; and determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag.

16 . The method of claim 15 , wherein determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag includes determining a picture rate.

17 . The method of claim 15 , wherein determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag includes determining a bit rate.

18 . The method of claim 15 , wherein determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag includes determining an order of a view.

19 . The method of claim 15 , wherein determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag includes determining a picture width.

20 . The method of claim 15 , wherein determining one or more parameters of the video asset by parsing one or more syntax elements corresponding to a respective flag includes determining colour primaries.

Assignees

• Sharp Kk

Inventors

• Deshpande Sachin G
• Misra Kiran Mukesh

Classifications

• H04N19/597

  specially adapted for multi-view video sequence encoding · CPC title

• H04N19/46 Primary

  Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) · CPC title

• H04N21/4884

  for displaying subtitles · CPC title

• H04N21/435

  Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream · CPC title

• H04N2005/44526

  Electricity · mapped topic