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Codec 2 is a low-bitrate speech audio codec (speech coding) that is patent free and open source. [1] Codec 2 compresses speech using sinusoidal coding, a method specialized for human speech. Bit rates of 3200 to 450 bit/s have been successfully created. Codec 2 was designed to be used for amateur radio and other high compression voice applications.
Lost frames often occur in connection with lost or delayed IP packets. Ordinary low-bitrate codecs exploit dependencies between speech frames, which cause errors to propagate when packets are lost or delayed. In contrast, iLBC-encoded speech frames are independent and so this problem will not occur. iLBC is defined in RFC 3951.
Bitcrusher effects usually have at least two controls: One reduces the sample rate, while the other reduces the resolution. The knob or slider for resolution reduction (a.k.a. "bit depth", "depth", or "bits") usually adjusts from 32 bits down to 1 bit.
Introduced in 2006, [3] it defines variable bit-rate wideband enhancement using up to 12 hierarchical layers. The core layer is an 8 kbit/s G.729 bitstream, the second layer is a 4 kbit/s narrowband enhancement layer, and the third 2 kibt/s layer is a bandwidth enhancement layer.
Variable bit-rate (VBR) Variable bit-rate (VBR) allows a codec to change its bit rate dynamically to adapt to the "difficulty" of the audio being encoded. In the example of Speex, sounds like vowels and high-energy transients require a higher bit rate to achieve good quality, while fricatives (e.g. s and f sounds) can be coded adequately with ...
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USA TODAY. From Angelina Jolie to Nicole Kidman, the biggest snubs in SAG nominations. Entertainment. People. Cher reveals what name is listed on her driver's license after opening up about birth