Search results
Results from the WOW.Com Content Network
Latency refers to a short period of delay (usually measured in milliseconds) between when an audio signal enters a system, and when it emerges.Potential contributors to latency in an audio system include analog-to-digital conversion, buffering, digital signal processing, transmission time, digital-to-analog conversion, and the speed of sound in the transmission medium.
Sound quality can remain a problem due to the design of the phone, the quality of the cellular network and compression algorithms used in long-distance calls. [ 245 ] [ 246 ] Audio quality can be improved using a VoIP application over Wi-Fi . [ 247 ]
The DS0 rate was introduced to carry a single digitized voice call. For a typical phone call, the audio sound is digitized at an 8 kHz sample rate, or 8000 samples per second, using 8-bit pulse-code modulation for each of the samples. This results in a data rate of 64 kbit/s.
Maximum available storage size increased to 64 GB while the 32 GB and 16 GB model options were retained. In September 2013 Apple released an iPhone 4s for free with a two-year contract, but with only 8 GB of storage. The screen is the same as the prior generation iPhones; 3.5 inches (89 mm), 640×960 resolution (Apple's "retina" design). [41]
Although the tablet is not designed to make phone calls over a cellular network, users can use a headset or the built-in speaker and microphone to place phone calls over Wi-Fi or cellular using a VoIP application, such as Skype. [17] The device has a dictation application, using the same voice recognition technology as the iPhone 4S. This ...
For example, for a 20 kHz analog audio sampled at 4× oversampling with second-order noise shaping, the dynamic range is increased by 30 dB. Therefore, a 16-bit signal sampled at 176 kHz would have a bit depth equal to a 21-bit signal sampled at 44.1 kHz without noise shaping. Noise shaping is commonly implemented with delta-sigma modulation.
Released just this year, they come with more features than you may expect given their tiny package: active noise cancellation, transparency mode, USB-C charging and a snug, customizable fit.
Some Lumia 1020 users have reported instances of rapid battery drain and overheating, random reboots or freezes, poor voice call quality or Wi-Fi drop outs. [37] The Windows Phone 8.1 update introduced an issue for some Lumia 1020 and 925 users where their phones would freeze randomly on a regular basis. [38]