Q1: How can I know that the designed high-fidelity audio signal is not distorted?
A1: When designing audio, you know whether it has high fidelity. Actually it comes from your decoding or encoding test of this audio. You will have a high-fidelity audio source. It may be uncompressed. Let me give an example of decoding. To clarify, you will first compress the high-fidelity audio source, which is the action of encoding. After this encoding, it is used for decoding. The same source of coded signal is based on the algorithm used by each company in the decoding process. The decoded signal may be different. Compared with your original signal, in the past, our experience with customers, the audio solution provided by Tensilica, the signal-to-noise ratio it decoded is quite low. If the noise ratio is very good, it means that during the decoding process, our loss is relatively small, which is a good choice for customers who need high fidelity.
Q2: Low-power audio is easier to understand, but what is the concept of low-power video?
A2: The concept of low-power video is actually very easy to understand. We know that in the video system, the most power consumption is not DSP decoding. The DSP decoding part actually only takes about 20% of the entire time. By 30, the part that consumes the most power is the part of the screen, which will consume about 50% of the power consumption. Even so, we still need to reduce the video DSP or video hardware when decoding. Power consumption required. In addition to the power consumption ratio required by the video DSP or video hardware during decoding, the other part is the bandwidth requirements of the DSP when it performs external memory transmission. If the bandwidth requirement is high, it means that its memory action is more, and the more action is in the electronic signal, the more power is consumed, so if your video solution can reduce the need for external memory transmission, for the entire IC design, The requirements for power consumption will follow to reduce. Our past experience shows that if you can reduce the power consumption of the external memory in the video system, if you can reduce it by 3% Ten, the overall power consumption can be reduced by 10%, the overall power consumption represents the power consumption of the screen.
Q3: What is the proportion of audio and video IP in the entire SOC?
A3: The proportion of audio and video IP in the SOC is about one-third to one-half, because video needs more area to solve.
Q4: What kind of special design does Tensillica processor need to interconnect with ARM bus?
A4: The link between Tensillica ’s processor and external devices is mainly through the PF bus. If the customer needs to connect to the device on the ARM bus, we can also provide a regulator from the PF bus to the HB or AXI bus. This adjustment process is actually It is very simple and is provided by Tensillica.
Q5: Excuse me, if you want to integrate audio data in a system, what issues should you pay attention to when designing?
A5: To integrate audio data in a system, there are not many things that need special attention. It mainly depends on the user's use of the audio system. If the audio part of the commission is entered in a normal situation, we will treat it as a cooperative Compared with other coprocessors, automatic coprocessors have no special differences.
Q6: What is the specific value of low-power audio and video typical power consumption?
A6: Generally speaking, low power consumption means that in an IC, the power consumption of the audio and video subsystem cannot exceed 50% of the entire IC. Generally speaking, the power consumption storage of an IC is about 200 to Between 300 watts / minute, so we add the entire audio and video system, its power consumption can be reduced to 150 watts / minute, our current design goal is to reduce the typical power consumption of the audio system to 100 watts / minute within.
Q7: What mode does Tensilica use for IP authorization? Is it the same as ARM?
A7: ATM's authorization mode is generally provided to cater to everyone, and Tensilica is a configurable processor, so we generally license to customers are soft core, that is, RTL mode, considering the protection of intellectual property, we may deal with RTL Encrypted. However, we also provide users with comprehensive scripts for this RTL and different process manufacturers and back-end process processing scripts, so users can easily use the RTL and various integrated and back-end scripts we provide between different manufacturers. Make a selection.
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