Changeset 1005 in SHVCSoftware for branches/SHM-dev/source/App/utils/ExtractAddLS/ReadMe.txt

Timestamp:

26 Jan 2015, 17:11:15 (10 years ago)

Author:

nokia

Message:

Implementation of JCTVC-R0235 - Processing of bitstreams without an available base layer

Location:

branches/SHM-dev/source/App/utils/ExtractAddLS

Files:

• . (moved) (moved from branches/SHM-dev/source/App/utils/BLRewrite)
• ReadMe.txt (modified) (1 diff)

branches/SHM-dev/source/App/utils/ExtractAddLS/ReadMe.txt

@@ -1 +1 @@
 
-This is a simple tool that extracts an independent non-base layer from a multi-layer bitstream, converts it to a base-layer bistream and writes it to a file. The tool is invoked as follows. 
+This a tool that either:
 
-  BLRewrite <infile> <outfile> <layer ID of the extracted layer>
+  1. Extracts an independent non-base layer from a multi-layer bitstream, converts it to a base-layer bistream and writes it to a file. The extraction processs is defined in chapter F.10.2 of the HEVC version 2 specification.
 
-The tool is based on the contribution JCTVC-Q0078 / JCTVC-R0042. Sub-bitstream extraction process done by the tool can be summarized as follows.
+or
 
-- NAL units with nal_unit_type not equal to SPS_NUT, PPS_NUT, EOS_NUT and EOB_NUT and with nuh_layer_id not equal to the assignedBaseLayerId are removed from outBitstream.
-- NAL units with nal_unit_type equal to SPS_NUT, PPS_NUT, EOS_NUT or EOB_NUT with nuh_layer_id not equal to 0 are removed from outBitstream.
-- For each NAL unit, the following applies:
-  – When nuh_layer_id is equal to assignedBaseLayerId, nuh_layer_id is set equal to 0.
+  2. Extracts an additional layer set sub-bitstream from multi-layer bitstream and writes it to a file. The extraction processs is defined in chapter F.10.3 of the HEVC version 2 specification.
 
-The resulting bitstream can be decoded with an HEVC/H.265 v1 compliant decoder as long as the extracted independent layer conform with v1 specification text. The tool removes VPS from the output bitstream so an HEVC/H.265 decoder should not expect it to be present.
+
+The tool is invoked as follows:
+
+  ExtractAddLS <infile> <outfile> <Max temporal ID> <layer IDs of the extracted layers>
+
+The process that is invoked is decided based on the number of IDs that are given in the layer ID list.  If only one layer ID is given, independent non-base layer rewriting process is invoked. If more than one layer ID is given, sub-bitstream extraction for additional layer sets is invoked.
+
+The result of independent non-base layer rewriting process can be decoded with an HEVC/H.265 v1 compliant decoder as long as the extracted independent layer conform with v1 specification text. The tool removes VPS from the output bitstream during rewriting so an HEVC/H.265 decoder should not expect it to be present.