Systems and methods for signaling of video parameters and information associated with caption services
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.
1. A method for signaling picture rate information, the method including:
signaling a first present syntax element indicating whether elements in the picture rate information are present;
signaling a second present syntax element indicating whether profile, tier, and level information is present for temporal sub-layers in an asset;
signaling the picture rate information defined for a value equal to a maximum number of temporal sub-layers minus one, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to one; and
signaling the picture rate information defined for a value equal to zero, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to zero,
wherein the picture rate information includes a picture rate code indicating information about a picture rate for an i-th temporal sub-layer of a video asset, for a value of i in a range of 0 to a maximum number of temporal sub-layers minus one.
2. A device for receiving picture rate information, the device comprising one or more processors configured to:
receive a first present syntax element indicating whether elements in the picture rate information are present;
receive a second present syntax element indicating whether profile, tier, and level information is present for temporal sub-layers in an asset;
receive the picture rate information defined for a value equal to a maximum number of temporal sub-layers minus one, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to one, and
receive the picture rate information defined for a value equal to zero, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to zero,
wherein the picture rate information includes a picture rate code indicating information about a picture rate for an i-th temporal sub-layer of a video asset, for a value of i in a range of 0 to a maximum number of temporal sub-layers minus one.
3. A method for receiving picture rate information, the method including:
receiving a first present syntax element indicating whether elements in the picture rate information is present;
receiving a second present syntax element indicating whether profile, tier, and level information is present for temporal sub-layers in an asset;
receiving the picture rate information defined for a value equal to a maximum number of temporal sub-layers minus one, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to one; and
receiving the picture rate information defined for a value equal to zero, if a value of the first present syntax element is equal to one and a value of the second present syntax element is equal to zero,
wherein the picture rate information includes a picture rate code indicating information about a picture rate for an i-th temporal sub-layer of a video asset, for a value of i in a range of 0 to a maximum number of temporal sub-layers minus one.