readme update about pi header and rate 1/2 and 3/4 data

Author: smarek

README.md

@@ -29,6 +29,7 @@ This package provides way to parse and assemble various DMR ETSI protocols and f
 | Block Product Turbo Code (196,96)                   |    ✅     |            ✅            |
 | Variable length BPTC (BPTC 128,72)                  |    ✅     |            ✅            |
 | Variable length BPTC (BPTC 68,28) for CACH/Short LC |    ✅     |            ✅            |
+| Variable length BTPC (BPTC 32,11) for Single-Burst  |    ✅     |            ✅            |
 
 ### CRC (Cyclic Redundancy Check) and Checksums
 
@@ -42,15 +43,18 @@ This package provides way to parse and assemble various DMR ETSI protocols and f
 
 ### ETSI PDUs (Protocol Data Units)
 
-| Name            | Encoding / Decoding | Description                                                                                                                | 
-|-----------------|:-------------------:|----------------------------------------------------------------------------------------------------------------------------|
-| CSBK            |          ✅          | Control Signalling Block, namely: BS Outbound Activation, Unit-Unit Request/Answer, Negative ACK, Preamble, Channel Timing |
-| EMB             |          ✅          | Embedded Signalling                                                                                                        |
-| FULL LC         |          ✅          | Full Link Control, namely: Group Voice, Unit-Unit, Talker Alias (header + blocks1,2,3), GPSInfo, Terminator with LC        |
-| SHORT LC        |          ✅          | Short Link Control, namely: Activity, Null                                                                                 |
-| SLOT            |          ✅          | Slot Type                                                                                                                  |
-| SYNC            |          ✅          | Synchronization patterns                                                                                                   |
-| Data Header     |          ✅          | Confirmed/Unconfirmed, Response, Defined Short Data                                                                        |
+| Name          | Encoding / Decoding | Description                                                                                                                | 
+|---------------|:-------------------:|----------------------------------------------------------------------------------------------------------------------------|
+| CSBK          |          ✅          | Control Signalling Block, namely: BS Outbound Activation, Unit-Unit Request/Answer, Negative ACK, Preamble, Channel Timing |
+| EMB           |          ✅          | Embedded Signalling                                                                                                        |
+| FULL LC       |          ✅          | Full Link Control, namely: Group Voice, Unit-Unit, Talker Alias (header + blocks1,2,3), GPSInfo, Terminator with LC        |
+| SHORT LC      |          ✅          | Short Link Control, namely: Activity, Null                                                                                 |
+| SLOT          |          ✅          | Slot Type                                                                                                                  |
+| SYNC          |          ✅          | Synchronization patterns                                                                                                   |
+| Data Header   |          ✅          | Confirmed/Unconfirmed, Response, Defined Short Data                                                                        |
+| PI Header     |          ✅          | Privacy (PI) Header, without further understanding of transported data                                                     |
+| Rate 1/2 Data |          ✅          | Rate 1/2 data (confirmed and unconfirmed) and last block data (confirmed and unconfirmed)                                  |
+| Rate 3/4 Data |          ✅          | Rate 3/4 data (confirmed and unconfirmed) and last block data (confirmed and unconfirmed)                                  |
 
 ### ETSI Information Elements