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  2. Program-specific information - Wikipedia

    en.wikipedia.org/wiki/Program-specific_information

    Dolby Digital Plus (enhanced AC-3) up to 16 channel audio for Blu-ray in a packetized stream 133 0x85 DTS 8 channel audio for Blu-ray in a packetized stream 134 0x86 SCTE-35 [5] digital program insertion cue message or DTS 8 channel lossless audio for Blu-ray in a packetized stream 135 0x87 Dolby Digital Plus (enhanced AC-3) up to 16 channel ...

  3. Telephony Application Programming Interface - Wikipedia

    en.wikipedia.org/wiki/Telephony_Application...

    TAPI 3.x has a slightly different set of functionality than TAPI 2.x. The addition of integrated media control was the most significant addition. But TAPI 3.x doesn't include all functionality that TAPI 2.x does, like support for the Phone class. One very notable issue with TAPI 3.x is the lack of support for managed code (.NET environment

  4. Trellis coded modulation - Wikipedia

    en.wikipedia.org/wiki/Trellis_coded_modulation

    Today, the most common trellis-modulated V.34 modems use a 4-dimensional set partition—achieved by treating two two-dimensional symbols as a single lattice. This set uses 8, 16, or 32 state convolutional codes to squeeze the equivalent of 6 to 10 bits into each symbol the modem sends (for example, 2,400 baud × 8 bits/symbol = 19,200 bit/s).

  5. PACTOR - Wikipedia

    en.wikipedia.org/wiki/PACTOR

    Pactor modes other than level 1 (P1) are not open source, [14] [15] but are publicly documented [16] and can be monitored and decoded easily over the air by third parties using free Raspberry Pi software ("PMON for Raspberry Pi") [17] or PMON utility on the modem itself. [18]

  6. Universal Software Radio Peripheral - Wikipedia

    en.wikipedia.org/wiki/Universal_Software_Radio...

    A rev 3 USRP1 platform, serial #140, with an attached TVRX daughterboard. Universal Software Radio Peripheral (USRP) is a range of software-defined radios designed and sold by Ettus Research and its parent company, National Instruments.

  7. DOCSIS Set-top Gateway - Wikipedia

    en.wikipedia.org/wiki/DOCSIS_Set-top_Gateway

    Likewise, persistent upstream errors will cause a cable modem to "reinitialize its MAC" and scan for new downstream channels. This behavior is appropriate for traditional cable modems, but not for cable set-top boxes. A cable set-top box still needs to acquire its out of band data even if the upstream channel is impaired.

  8. Source–message–channel–receiver model of communication

    en.wikipedia.org/wiki/Source–message–channel...

    It is also referred to as the sender–message–channelreceiver model, the SMCR model, and Berlo's model. It was first published by David Berlo in his 1960 book The Process of Communication. It contains a detailed discussion of the four main components of communication: source, message, channel, and receiver. Source and receiver are usually ...

  9. Primary Rate Interface - Wikipedia

    en.wikipedia.org/wiki/Primary_Rate_Interface

    The T1 line consists of 23 bearer (B) channels and one data (D) channel for control purposes, [1] for a total bandwidth of 24x64-kbit/s or 1.544 Mbit/s. The E1 carrier provides 30 B- and one D-channel for a bandwidth of 2.048 Mbit/s. [2] The first timeslot on the E1 is used for synchronization purposes and is not considered to be a B- or D ...