ADVANCED AUDIO DISTRIBUTION DRIVER DETAILS:
|File Size:||4.0 MB|
|Supported systems:||Windows 7/8/10, Windows XP 64-bit, Mac OS X 10.X|
|Price:||Free* (*Free Registration Required)|
ADVANCED AUDIO DISTRIBUTION DRIVER
Resources of the multiple processors are more effectively utilized such that the advanced audio distribution profile A2DP is supported.
A detailed description is given in the following embodiments with reference to the Advanced Audio Distribution drawings. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense.
Supported Bluetooth profiles
The scope of the invention is best determined by reference to the appended claims. More specifically, the audio player may be a mobile phone.
The chipset comprises a first processor and a second processor More specifically, the storage device may be a magnetic memory device, an optical memory device, a semiconductor memory, or combinations thereof. Preferably, the first processor is a Advanced Audio Distribution unit MCU and the second processors is a digital signal processor DSP.
In addition, the chipset further comprises a host controller interface HCI coupled between a Bluetooth host and a Bluetooth controller The first and second processors and collectively act as a Bluetooth host performing A2DP source encoding. Data transfer flow of A2DP source encoding is described as follows. Decoded audio source data from the audio decoder undergoes SBC encoding by applications on the audio source side according to A2DP specifications. SBC is the only encoding scheme necessarily supported. Compressed music files are decompressed for input in pulse coded modulation PCM format by an audio decoder. Polyphase analysis generates sub-band samples. In stepscale factors are calculated according to signal characteristics of each sub-band and bit allocation of each sub-band is derived.
Then, in stepthe sub-band samples are scaled and APCM quantized. Thereafter, in stepthe Advanced Audio Distribution sub-band samples are packed into a bit stream. Scale factor Advanced Audio Distribution, bit allocation, APCM quantization, and bit stream packing require more program memory but less computing power.
List of Bluetooth profiles - Wikipedia
The first processor is typically provided with a larger address space and an interface for an external memory. Programs are typically executed in the external memory provided with low cost but long access cycle. Accordingly, tasks requiring large program memory but little computing power are suitable to be performed Advanced Audio Distribution the first processor. Thus, scale factor calculation, bit allocation, quantization, and bit stream packing are more suitable to be performed by the first processor with memory expansion via external memory peripherals. The blocks of polyphase analysis comprise regular linear transform functions. Since processors with strong computing power typically utilize a built-in memory to perform computing to avoid computing efficiency degradation due to slow memory access, it is more efficient to implement regular linear transform functions with processors with strong computing power.
Accordingly, polyphase analysis requires more computing power but less program memory and it more suitable to be performed in the second processor with strong computing power. Advanced Audio Distribution, polyphase analysis is performed by the second processor and thus the second part of the A2DP source encoding comprises polyphase analysis of SBC encoding.
Bluetooth® Advanced Audio Distribution Profile (A2DP) Profile Support for Windows® 10
The second part of the A2DP source encoding performed in the second processor comprises adaptive pulse code modulation APCM quantization, scale factors calculation and bit allocation, and polyphase analysis. The second part 20 of the A2DP source encoding performed in the second processor comprises scale factors calculation and bit allocation, and polyphase analysis. The second part of Advanced Audio Distribution A2DP source encoding performed in the second processor only comprises polyphase analysis. The audio player comprises a chipset as disclosed in FIG.
Resources of the multiple processors are more effectively utilized such that advanced audio distribution profile A2DP is supported. While the invention has been described by way of example and in Advanced Audio Distribution of preferred embodiment, it is to be understood that the invention is not limited thereto.
To the contrary, it is intended to cover various modifications and similar arrangements as would be apparent to those skilled in the art. Therefore, the scope of the appended claims should Advanced Audio Distribution accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims 18 1. In PC-to-PC usage models such as conference table and file transfera PC may use this information to supplement information from other Bluetooth specifications to identify the right device to communicate with. A cellular phone may use this information to identify associated accessories or download Java apps from Advanced Audio Distribution device that advertises its availability.
The technical term "Advanced Audio Distribution Profile" - in short A2DP - refers to a Advanced Audio Distribution standard via a Bluetooth connection, for the wireless transfer of high quality audio signals. The Advanced Audio Distribution Profile is used between an A2DP source and a recipient. Explains the Bluetooth® Advanced Audio Distribution Profile (A2DP) Profile Support for Windows® 10 with the Intel Wireless Adapters.