Are you confused about the terms “Bitstream” and “PCM” when setting up your old DVD player or Blu-ray home theater system? Don’t worry; we’ve got you covered! This guide aims to explain the differences between Bitstream and PCM in simple terms, so you can make the best choice for your audio setup without feeling overwhelmed by technical jargon.
What is Bitstream?
Let’s start with Bitstream, which has been around since 1961. A bitstream is like a flowing stream of tiny pieces of information called “bits.” Each bit can represent either a 0 or a 1, conveying specific information based on its value. As more bits are added, the total information increases exponentially. For example, 4 bits can represent 16 possible states.
In Bitstream, audio sounds are compressed and converted into digital bits, forming a continuous stream. This stream of bits travels from your player to the receiver, which then decodes the information and turns it into the audio you hear. Bitstream offers the advantage of low bandwidth and can be used for wireless audio connections without sacrificing quality.
However, it’s essential to note that Bitstream data can be sent over digital optical or coaxial cables, making it compatible with high-end modern players like Sonos Arc or VIZIO Elevate.
Pros of Bitstream:
- Possibility of surround sound.
- Works with digital optical or coaxial cables.
- Low quality degradation.
- Suitable for wireless audio listening.
Cons of Bitstream:
- Limited support for secondary audio channels.
- Only usable with high-end modern players.
What is PCM?
PCM stands for Pulse Code Modulation. Unlike Bitstream, PCM is an uncompressed audio format. Instead of sending a continuous stream of bits, PCM represents audio as a series of samples. Each sample captures the sound at a specific moment in time and is represented by a precise numerical value. PCM preserves the audio quality without any compression, but it requires more bandwidth than Bitstream.
Pros of PCM:
- No loss of audio quality due to compression.
- Supports secondary audio channels.
- Compatible with various audio devices.
Cons of PCM:
- Larger bandwidth requirement.
Bitstream vs. PCM:
Which is Better? The choice between Bitstream and PCM depends on your audio setup and equipment. Bitstream is suitable for wireless audio and is favored by high-end modern players. On the other hand, PCM offers uncompromised audio quality and broader compatibility with different devices.
When Should You Use Bitstream or PCM?
- Use Bitstream when you have high-end modern players or need wireless audio connections.
- Choose PCM for the best audio quality and when your equipment supports it.
Conclusion:
Understanding Bitstream and PCM doesn’t require a Ph.D. in audio. In simple terms, Bitstream is a compressed audio format that offers wireless capabilities, while PCM is an uncompressed format providing superior audio quality. Choose the one that suits your setup and preferences, and enjoy your retro movie night with great sound!