AV output
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AV output. Analogue output for video and audio transferring. Previously, due to the large size of the equipment, it consisted of 3 RCA jacks and was connected to the TV accordingly. Now the devices have become more compact and don't have free space on the case. Therefore, the AV output is a single headphone jack, to which a tee cable is already connected (check availability in the package). Since all components of the video signal are on the same cable, the picture quality and immunity to interference are low.
Video decoders
Codec — from the phrase "Encoder-DECoder" — in this case is the format used for encoding digital video during storage/transmission and decoding during playback (without encoding, video data would take up an unjustifiably large amount of space). Do not confuse this parameter with the format of video files: different files of the same format can be encoded with different codecs, and if the corresponding codec is not supported by the player, video playback will be impossible, even if the file format itself corresponds to the capabilities of the device. And in models with online TV support (see "Features") this nuance also determines compatibility with a specific broadcast: the general format of the broadcast is indicated by the codec used for this.
In general, modern devices usually have quite extensive sets of codecs (one of the most advanced is
H.265,
AV1 codecis also popular), and there are usually no problems with video playback; in extreme cases, you can use special programs for transcoding files. As for specific codecs, detailed data on them can be found in special sources, but with standard use of media players, such details are not needed.
Cooling system
The type of cooling system used in the device.
— Passive. Systems based on natural heat dissipation; usually, one or another type of radiators is used. Passive cooling is absolutely silent, does not require energy and is extremely reliable — roughly speaking, there is simply nothing to break in it. Its main disadvantage is its low efficiency; this is not critical for relatively simple and low-power devices, however, passive systems are not suitable for advanced models (although Android models are often an exception to this rule).
— Active. Cooling systems with forced heat removal; usually the presence of fans is assumed. Such cooling is extremely efficient, making it suitable for use even in the most powerful devices with intense heat dissipation. Its disadvantages are noise, increased power consumption, as well as the probability of failure (very low, but nonetheless existing).
