The VHDL Digital HDL Library is the foundation of any high-speed digital multimedia solution. In order to understand how this library of digital-signed data works, one needs to know about its two layers – the digital HDL (high-level language) and the hardware HDL. Both these layers translate the analog signal into a digital form. They accomplish this by first filtering the incoming analog signal to remove unwanted components, then scrambling the digital signal to create a series of binary zeroes and ones. This creates a unique series of binary code that is only understandable by the device that reads the analog signal.
As we all know, digital-based audio and video streams are sent over a wire interface, while analog signals can be done so through a data stream. A typical VHDL implementation will first look at the analog video stream and attempt to decipher the binary equivalent of it. If the hardware decoder cannot decode the signals, it will move on to the digital audio stream. In essence, it performs analog to digital conversions.
There are several different types of VHDL converters on the market today. One popular type is the software based VHDL encoders, which you can simply run in your own computer. Since they do not have to be programmed using HDL languages, they’re often less expensive as well. More importantly, such software based converters are more flexible and produce higher quality results, especially if employing advanced features like frame pacing, manual controls, and signal processing. Some even allow for direct connection with digital video and audio hardware through the use of digital-to-analog converters.
On the other hand, hardware-based digital-to-analog converter (DAC) based on VHDL technology is capable of decoding and converting analog audio signals to digital ones. The benefits of this type of converter are that it is simple to implement and it has a higher quality result. Usually, such hardware based converters can also interface with digital video and audio hardware that support VHF or UHF bands.
When it comes to the quality of digital to analog converter, good news is that the latter works well regardless of the frequency range. They only need to be set up in the appropriate range and they are good to go. Usually, these converters work fine with low and medium bandwidth audio streams. Because analog audio signals are in the form of voltage, however, their quality is usually determined by the voltage modulation.
Digital-to-analog converters can be installed on a computer network in order to convert analog signal to digital format. Alternatively, they can be directly connected to a VGA monitor and the analog signal transmitted via VGA cables. Alternatively, you can even use an RCA cable to connect them to a TV. As a result, you will get the best analog to digital video conversion ratio, and your audio video conversion needs will be satisfied as well.