Signaling high dynamic range and wide color gamut content in transport streams

1. An apparatus including a processor receiving a transport stream, the apparatus comprising:

(a) said transport stream includes a program map table;

(b) said program map table indicates an elementary stream with a stream type and an elementary stream identifier;

(c) said elementary stream indicates a High Efficiency Video Coding (HEVC) stream by using a particular stream type value;

(d) a High Efficiency Video Coding video descriptor associated with said HEVC stream signaling a presence or an absence of a high dynamic range (HDR) content and a wide color gamut (WCG) content in said elementary stream;

(e) wherein said high dynamic range (HDR) content and said wide color gamut (WCG) content are signaled by separately in two flags or combined into two bits of a single syntax element that indicates said presence or absence of said high dynamic range (HDR) content and/or said wide color gamut (WCG) content.

2. The apparatus of claim 1 , wherein said syntax element signals both the presence or absence of HDR and/or WCG using two bits.

3. The apparatus of claim 2 , wherein said HEVC video descriptor is included in a bitstream encoded with HEVC.

4. The apparatus of claim 1 , wherein said stream type identifier indicates an encoding scheme used to encode said elementary stream.

5. The apparatus of claim 4 , wherein said stream type identifier is set to “0x24” to indicate that said elementary stream is a bitstream encoded with High Efficiency Video Coding (HEVC).

6. A method of decoding a video included in a transport stream, the method comprising:

(a) receiving at a decoder said transport stream that includes a program map table;

(b) receiving at said decoder said program map table that indicates an elementary stream with stream type and elementary stream identifier;

(c) receiving at said decoder said elementary stream that indicates a High Efficiency Video Coding (HEVC) stream by using a particular stream type value;

(d) receiving at said decoder an HEVC video descriptor associated with said HEVC stream signaling a presence or absence of a high dynamic range (HDR) content and a wide color gamut (WCG) content in said elementary stream;

(e) wherein said high dynamic range (HDR) content and said wide color gamut (WCG) content are signaled separately in 2 flags or combined into 2 bits of a single syntax element that indicates the presence or absence of HDR and/or WCG content.

7. The method of claim 6 further comprising performing at said decoder one or more post-processing operations on values decoded from said elementary stream to reconstruct high dynamic range and/or wide color gamut content.

8. The method of claim 7 , wherein said one or more post-processing operations are identified by supplemental enhancement information within said elementary stream.

9. The method of claim 7 , wherein said one or more post-processing operations are identified by video usability information within said elementary stream.