JP4573723B2 - Transport stream monitoring device - Google Patents

Description

  The present invention is included in PSI (Program Specific Information) table, SI (Service Information) table information, and elementary streams such as video and audio, which are included in transport streams according to the MPEG (Moving Picture Experts Group) standard. The present invention relates to a transport stream monitoring apparatus for monitoring parameters.

  A transport stream monitoring device that complies with the Moving Picture Experts Group (MPEG) standard extracts a Program Specific Information (PSI) table and a SI (Service Information Information) table that are included in the transport stream, and these tables comply with the standard. It analyzes whether the data is transmitted in the format and monitors whether the table is transmitted at the correct cycle.

On the other hand, elementary streams such as video and audio that are multiplexed in the transport stream have different video aspect ratios for each program, and the number of audio channels varies from monaural to 5.1 channel surround. ing. In addition, data for controlling the receiver is included in a PSI (Program Specific Information) table. There is a request to confirm whether these complicated parameters and the control data of the receiver are transmitted with correct values (see Patent Document 1).
Japanese Patent Laid-Open No. 2004-200764

  However, the conventional transport stream monitoring apparatus only monitors whether or not the operation based on the regulation is performed, and does not include means for determining whether or not the transmitted parameters and control data are correct values. Therefore, in order to monitor the contents of data, there is a problem that an operator must visually confirm the data extracted by the apparatus on a display or the like.

  The present invention has been made in view of such problems, and is used to automatically detect errors in data transmitted in a transport stream and errors in parameters included in elementary streams such as video and audio. An object is to provide a suitable transport stream monitoring device.

The present invention was devised to achieve the above object, and is an apparatus for monitoring a transport stream according to the MPEG (Moving Picture Experts Group) standard.
An input for inputting a transport stream;
A demultiplexer (DeMux) unit that extracts a Program Specific Information (PSI) table, an SI (Service Information) table, and an elementary stream from the transport stream;
An analysis unit for analyzing the extracted PSI table, SI table, and elementary stream, and extracting parameters and information to be monitored;
An input unit for inputting digital video and audio signals;
An auxiliary data extraction unit for extracting auxiliary data of digital video and audio signals;
A parameter comparison / determination unit that compares and determines the parameters and information obtained from the transport stream and auxiliary data extracted from the digital video and audio signals;
And an alarm output unit that outputs an alarm to the outside based on the determination result.

  According to the present invention, the parameter comparison / determination unit compares and determines the parameter and information obtained from the transport stream and auxiliary data extracted from the digital video and audio signals, and based on the determination result. The alarm output unit outputs alarms (including all media used as alarms such as electric signals, sound, light, etc.) to the outside, so that errors in data transmitted in the transport stream, video, and audio Etc., it is possible to automatically detect errors in parameters included in the elementary stream.

  Further, control is performed to confirm that the transport stream signal input to the transport stream monitoring device is a stream to be monitored and that the input digital video and audio signals are signals to be compared. It is preferable that an ID for identifying a transport stream signal, a digital video signal, and an audio signal is set by the unit, and the parameter comparison / determination unit determines whether the monitoring target and the comparison target are a correct combination.

  Further, by inserting a service ID or a program number included in the transport stream and an ID common to the digital video and audio signal auxiliary data, the analysis unit and the auxiliary data extraction unit extract the respective IDs, The parameter comparison / determination unit determines whether the monitoring target and the comparison target are a correct combination.

  Further, the transport stream monitoring apparatus inserts a service ID or program number defined in the PSI table of the transport stream into the auxiliary data of the digital video and audio signals, thereby comparing and determining the parameters. In the section, it is preferable to determine whether the monitoring target and the comparison target are a correct combination.

  Hereinafter, the present invention will be described with reference to embodiments. FIG. 1 is a block diagram showing a transport stream monitoring apparatus 10 according to the present embodiment. In FIG. 1, a transport stream input unit 11 is based on an MPEG standard transport stream, that is, based on ARIB standard STD B-32 [video coding, audio coding and multiplexing system standard in digital broadcasting]. The encoded and multiplexed video and audio data are input. The transport stream input unit 11 performs synchronization detection and acquires data in units of one packet.

  The demultiplexer (DeMux) unit 12 extracts the PSI table, SI table, and video and audio elementary streams and inputs them to the analysis unit 13.

  In the analysis unit 13, the PSI / SI analysis unit 13 a extracts an emergency information descriptor and a digital copy control descriptor, which are control information of the receiver, from a PMT (Program Map Table). In addition, the video ES analysis unit 13b extracts aspect_ratio_information, profile_and_level_indication, and frame_rate_code from the sequence_header. Further, channel_configuration and matrix_mixdown_idx are extracted from the voice ES analysis unit 13c.

  Digital video and audio signals input to the encoding apparatus are bit-serial based on ARIB standard STD B-6 (525/60 television system) and ARIB standard BTA S-005A (1125/60 television system). The signal is input to the digital video / audio signal input unit 14 of the apparatus 10 via the interface. The auxiliary data of this signal includes inter-broadcasting station control data defined in the ARIB standard STD-B39, and the private area of the inter-broadcasting station control data includes a service for identifying this signal. An emergency alert and a copy control code are set as information for controlling the ID and the receiver.

  The auxiliary data extraction unit 15 extracts each code of the video mode, video format, frame rate, sampling structure, audio mode, and downmix designation included in the inter-broadcast station control data. Further, the emergency alert, digital copy control, and service ID codes defined in the private area of the auxiliary data are extracted and input to the parameter comparison / determination unit 16.

  The apparatus control unit 20 controls the start and stop of monitoring, selects parameters to be monitored and information, and sets them in the apparatus 10. Further, a TS-ID and a service ID are input to identify the transport stream to be monitored, and a service ID for identifying digital video and audio signals is set in the apparatus 10.

  The parameter comparison / determination unit 16 determines whether the TS-ID and the service ID input from the analysis unit 13 match the values set by the device control unit 20. Send a signal to indicate that there is an error. Similarly, the service ID of the digital video and audio signal input from the auxiliary data extraction unit 15 is compared with the value set by the device control unit 20, and if there is a discrepancy, a signal is transmitted to the device control unit 20 and an error occurs. A message is displayed.

  When the IDs match, the video and audio parameters and PMT descriptor data extracted by the analysis unit 13 are compared with the codes input from the auxiliary data extraction unit 15 to determine whether they match. . When there is a mismatch, the result is input to the alarm output unit 17, and the alarm output unit 17 notifies the result (alarm signal) to an alarm display terminal (not shown) via a contact or SNMP (Simple Network Management Protocol). If there is a mismatch, an alarm can be displayed.

  Note that the data and information obtained from the transport stream and the digital video and audio signals have different update times of information, and therefore mismatch occurs at the time of update. Therefore, it is possible to set a parameter for masking a certain mismatch time from the apparatus control unit so that an alarm is not output at the time of updating.

  As described above, according to the present embodiment, it is possible to automatically recognize whether or not the data in the transport stream is transmitted with a correct value, and to set the parameters of the encoding device and the multiplexing device. It is possible to monitor errors and failures of the encoding device and the multiplexing device. Further, by using auxiliary data of digital video and audio signals, it is possible to construct a system without making a facility for newly transmitting data to be compared.

It is a block diagram which shows the transport stream monitoring apparatus 10 concerning this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Transport stream monitoring apparatus 11 Stream input part 12 Demultiplexer (DeMux) part 13 Analysis part 13a PSI / SI analysis part 13b Video ES analysis part 13c Audio | voice ES analysis part 14 Audio | voice signal input part 15 Auxiliary data extraction part 16 Parameter comparison・ Decision unit 17 Alarm output unit 20 Device control unit

Claims (3)

In an apparatus for monitoring a transport stream according to the MPEG (Moving Picture Experts Group) standard,
An input for inputting a transport stream;
A demultiplexer (DeMux) unit that extracts a Program Specific Information (PSI) table, an SI (Service Information) table, and an elementary stream from the transport stream;
An analysis unit for analyzing the extracted PSI table, SI table, and elementary stream, and extracting parameters and information to be monitored;
An input unit for inputting digital video and audio signals;
An auxiliary data extraction unit for extracting auxiliary data of digital video and audio signals;
A parameter comparison / determination unit that compares and determines the parameters and information obtained from the transport stream and auxiliary data extracted from the digital video and audio signals;
And an alarm output unit that outputs an alarm to the outside based on the determination result.   In order to confirm that the transport stream signal input to the transport stream monitoring device is a stream to be monitored and that the input digital video and audio signals are signals to be compared, An ID for identifying a transport stream signal, a digital video signal, and an audio signal is set, and the parameter comparison / determination unit determines whether the monitoring target and the comparison target are a correct combination. The transport stream monitoring apparatus according to claim 1. The ID common to the service ID or program number included in the transport stream is inserted into the auxiliary data of the digital video and audio signal, and the ID is extracted by the analysis unit and the auxiliary data extraction unit, and the parameter The transport / stream monitoring apparatus according to claim 1, wherein the comparison / determination unit determines whether the monitoring target and the comparison target are a correct combination.

Images