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2. DVB-T2 - Wikipedia

   en.wikipedia.org/wiki/DVB-T2

   In March 2006, DVB decided to study options for an upgraded DVB-T standard. In June 2006, a formal study group named TM-T2 (Technical Module on Next Generation DVB-T) was established by the DVB Group to develop an advanced modulation scheme that could be adopted by a second generation digital terrestrial television standard, to be named DVB-T2.

3. Analog television - Wikipedia

   en.wikipedia.org/wiki/Analog_television

   The video amp and output amplifier is implemented using a pentode or a power transistor. The filter and demodulator separates the 45.75 MHz video from the 41.25 MHz audio then it simply uses a diode to detect the video signal. After the video detector, the video is amplified and sent to the sync separator and then to the picture tube.

4. Digital terrestrial television - Wikipedia

   en.wikipedia.org/wiki/Digital_terrestrial_television

   The selected broadcasting standard is DVB-T with MPEG2 video for SD and H.264 video for HD, audio is usually MPEG1. The whole frequency spectrum has been allocated with SFN in mind. Along the original analog free to air channels that switched to digital, a few new pay per view platforms came around with the advent of DTT.

5. Energy conversion efficiency - Wikipedia

   en.wikipedia.org/wiki/Energy_conversion_efficiency

   Energy converter is an example of an energy transformation. For example, a light bulb falls into the categories energy converter. η = P o u t P i n {\displaystyle \eta ={\frac {P_{\mathrm {out} }}{P_{\mathrm {in} }}}} Even though the definition includes the notion of usefulness, efficiency is considered a technical or physical term.

6. Percentage - Wikipedia

   en.wikipedia.org/wiki/Percentage

   To calculate a percentage of a percentage, convert both percentages to fractions of 100, or to decimals, and multiply them. For example, 50% of 40% is: ⁠ 50 / 100 ⁠ × ⁠ 40 / 100 ⁠ = 0.50 × 0.40 = 0.20 = ⁠ 20 / 100 ⁠ = 20%. It is not correct to divide by 100 and use the percent sign at the same time; it would literally imply ...

7. Spotify - Wikipedia

   en.wikipedia.org/wiki/Spotify

   Uploading was free and artists received 100% of the revenue from songs they uploaded; artists were able to control when their release went public. On 1 July 2019, Spotify deprecated the program and announced plans to stop accepting direct uploads by the end of that month and eventually remove all content uploaded in this manner.