TR101 analysis can be added to an input stream for the monitoring of the TS while in operation. The analysis can be used to check the integrity of the TS, as well as perform content analysis to identify frozen video, blank picture, silent audio, low video quality and audio clipping. The TR101 analysis covers priority 1 and 2 messages.
To enable the TR101 analysis follow the instructions in the Adding TR101 Analysis to the Input Stream section. After enabling the analysis, the stream will include the P1 (high priority error) and P2 (low priority error) status, indicating is there are P1 or P2 messages.
To open the analysis window, click the stethoscope (
) icon.
The TR101 Analysis window includes the following elements:
Stream Information Statistics Panel
The stream information statistics panel displays the following accumulative statistics about the stream:
| Parameter | Description |
|---|---|
| Status | |
| TR101 performance drops | |
CQA performance drops | Specify the UDP port to be used for streaming the video. |
| Error | Specify the UDP port to be used for streaming the audio. |
PAT | The Program Association Table (PAT), which only appears in PID 0x0000 packets, tells the decoder what programs are in the TS and points to the Program Map Tables (PMT) which in turn point to the component video, audio and data streams that make up the program. If the PAT is missing then the decoder can do nothing, no program is decodable. |
Min bitrate | The minimum bitrate of the PAT packets |
Max bitrate | The maximum bitrate of the PAT packets |
Avg bitrate | The average bitrate of the PAT packets |
CC errors | Indicates if continuity count errors were found. For this indicator three checks are combined. The preconditions "Incorrect packet order" and "Lost packet" could cause problems for IRD which are not equipped with additional buffer storage and intelligence. It is not necessary for the test equipment to distinguish between these two preconditions as they are logically OR-ed, together with the third precondition, into one indicator. |
| Scrambled | Indicates if the packet is encrypted. |
Packets | The number of packets which are related to the PAT (with the same PID – 0) |
NULL | Null (stuffing) packets. In order to ensure that the stream maintains a constant bitrate, a multiplexer may need to insert some additional packets. The PID 0x1FFF is reserved for this purpose. The payload of null packets is all zeroes, and the receiver is expected to ignore its contents. Null packets are indicated by PID 8191 (all 1s). |
Min bitrate | The minimum bitrate of the NULL packets |
Max bitrate | The maximum bitrate of the NULL packets |
Avg bitrate | The average bitrate of the NULL packets |
| Packets | The number of packets which are related to NULL (with the same PID 8191) |
| Programs | The Transport Stream can include one program (SPTS) or multiple programs (MPTS). Every program is described by a program map table (PMT). The elementary streams associated with that program have PIDs listed in the PMT. Another PID is associated with the PMT itself. |
PMT PID | Indicates the PID number of the program map table PMT. |
Min bitrate | The minimum bitrate of the packet which is related to the PMT PID. |
Max bitrate | The maximum bitrate of the packet which is related to the PMT PID. |
Avg bitrate | The average bitrate of the packet which is related to the PMT PID. |
CC errors | Indicates if continuity count errors were found in the packets that are related to the PMT PID. For this indicator three checks are combined. The preconditions "Incorrect packet order" and "Lost packet" could cause problems for IRD which are not equipped with additional buffer storage and intelligence. It is not necessary for the test equipment to distinguish between these two preconditions as they are logically OR-ed, together with the third precondition, into one indicator. |
PCR PID | Indicated the PID value that includes the program clock reference (PCR). The PCR is used to enable a decoder to present synchronized content, such as audio tracks matching the associated video. |
| PCR | Indicates the program clock reference (PCR) value. |
Accuracy | Indicates the difference between the actual PCR value and the value it should have in the TS represented by the byte index for its actual position. For example, if the calculated PCR (derived from adding the value to the previous packet) is the same as the actual PCR value, the Accuracy value will be '0'. |
Deviation | Indicates the frequency deviation. |
| Delay | Indicates the delay in delivery. |
OJ max | Indicates the maximal Overall Jitter, which are variation in delays. |
OJ Dev | Indicates the deviation in the overall jitter. |
Bitrate | The bitrate of the specific PCR PID packets. |
Elementary PIDs | Below the Elementary PIDs level are all the different programs that are included in the stream. |
| Type | The type of program. |
Min Bitrate | The minimum bitrate of the packet which is related to the Elementary PID. |
Max Bitrate | The maximum bitrate of the packet which is related to the Elementary PID |
Avg Bitrate | The average bitrate of the packet which is related to the Elementary PID |
CC errors | Indicates if continuity count errors were found in the packets that are related to the Elementary PID. |
Scrambled | Indicates if the packet is encrypted. Possible values include: Not scrambled, scrambled with even key, scrambled with odd key. |
PTS | The Presentation Time Stamp (PTS) that the analyzer has captured on the Element stream. The PTS is only accessible if the TS is not scrambled |
| DTS | The Decode Time Stamp (DTS) that the analyzer has captures on the Element stream. The Decode Time Stamp (DTS) indicates the time at which an access unit should be instantaneously removed from the receiver buffer and decoded. It differs from the Presentation Time Stamp (PTS) only when picture reordering is used for B pictures. If DTS is used, PTS must also be provided in the bit stream. PTS (or DTS) is entered in the bitstream at intervals not exceeding 700 mS. ATSC further constrains PTS (or DTS) to be inserted at the beginning of each access unit. |
Total Bytes | The total amount of bytes that has passed through the current elementary stream. This includes the Transport Stream Headers. |
| Packets | The total amount of packets that have passed through the current elementary stream. |
| Width | The frame resolution width setting. |
| Height | The frame resolution height setting. |
| FPS | The Frames Per Second setting. |
| Interlaced | Indicates whether the video is interlaced or not. |
| Chroma | Indicates the Chroma Subsampling. |
| Frames | Indicates the number of frames. This indicator is enabled when content analysis is turned on. |
Content | Indicates the status of the content. This indicator is enabled when content analysis is turned on. Possible values:
|