G.723 is a telecommunication standard for voice audio compression. It uses a low data rate and is commonly used in Voice over Internet Protocol (VoIP) technologies. This standard produces good audio quality, and it is optimized for efficient network transmission.


The phonetics of the keyword “G.723” would be: “Gee point Seven Two Three”

Key Takeaways

  1. G.723 is a standard used in VoIP (Voice over Internet Protocol) for audio compression. It has two bit rates associated with it – 5.3 and 6.3 kbps, with the lower bit rate having higher compression.
  2. Its primary feature is its low bandwidth requirements that make G.723 ideal for long-distance communications. However, this comes at the cost of audio quality which is slightly reduced due to the signal compression.
  3. G.723 is susceptible to latency issues, which can affect the quality of voice calls. Yet, this delay is generally tolerable for most users and G.723 remains widely used due to its network efficiency.


G.723 is an important technology term as it refers to a specific standard for voice compression and decompression that is commonly used in Voice over Internet Protocol (VoIP) applications. It is pivotal in telecommunication because it provides a method for efficient data transmission, enabling high-quality voice communication over data networks. It operates at a low data rate, which minimizes the use of network bandwidth, making it a cost-effective choice. Although it may add some extra latency due to the complexity of the compression and decompression processes, G.723 allows transmitting and receiving clear and understandable voice communication, even on less-reliable network connections.


G.723 is primarily used for voice data transmission and its primary purpose lies in compression of voice data. As a audio codec for voice over IP (VoIP) technology, G.723 is a standard specification that was conceptualized and developed by the ITU-T (International Telecommunication Union – Telecommunication Standardization Sector), the key international organization for global telecommunications standards. The G.723 codec plays a significant role in the Internet telephony or VoIP services, which allows for a more efficient use of bandwidth. G.723 is utilised for converting analogue voice signals into digital data which can then be transmitted over the internet. Telephony applications such as online conferencing, telecommuting, and distance learning effectively use G.723 codec. This codec is especially skilled at compressing high-quality audio data with minimal loss, resulting in sound that is almost as good as the original, despite the small file size. Thus, it plays a considerable part in maintaining good transmission quality despite lower bandwidths.


1. VoIP Communication: G.723 is widely used in Voice over Internet Protocol (VoIP) solutions. Applications such as Skype or Google Voice take advantage of this codec due to its low bit rate which reduces the bandwidth needed for voice calls, while still providing acceptable voice quality.2. Video Conferencing Systems: G.723 is often used in video conferencing systems where bandwidth is a major concern. Its low bandwidth requirement allows for clear voice communication even in situations where internet connection might be poor, making it an ideal choice for businesses and individuals who rely on video calls for communication.3. Telephony Gateways: These devices convert voice and fax calls, in real time, between the public switched telephone network (PSTN) and an IP network. The G.723 codec is commonly used in these telephony gateways to aid in the efficient transmission of voice over the networks.

Frequently Asked Questions(FAQ)

**Q1: What is G.723?**A: G.723 is a standard for audio codec that compresses speech allowing for transmission over digital communication networks. It was developed by the International Telecommunication Union (ITU).**Q2: What are the uses of G.723?**A: G.723 is mainly used in Voice over Internet Protocol (VoIP) services for the digitization and compression of analog signals.**Q3: What are the key features of G.723?**A: G.723 has relatively low bandwidth requirements. It is known for providing good quality voice transmission while using less network bandwidth compared to other codecs.**Q4: How does G.723 work?**A: G.723 works by compressing voice signals into digital data which can then be transmitted over a network. It uses a method of compression called sub-band ADPCM.**Q5: What’s the difference between G.723 and other similar standards like G.711 or G.729?**A: The key difference among these standards is the data rate and voice quality they offer. G.723 uses less bandwidth and offers a lower sound quality compared to G.711, but has higher quality than G.729.**Q6: Is G.723 widely used today?**A: While G.723 is still functional, it is not as widely used today as it was before due to the advancement in other codecs that offer superior voice quality and use similar or even lower amounts of bandwidth.**Q7: What are the drawbacks of G.723?**A: Some of the potential drawbacks of G.723 include lower voice quality when compared to some other codecs and a higher computational complexity which may increase power consumption in some devices.**Q8: Does G.723 support stereo sound?**A: No, G.723 is designed for compressing mono, or single-channel, audio. It is not intended for stereo or multi-channel audio.**Q9: Can G.723 be used for music or does it only work for voice signals?**A: While G.723 can technically compress any sound, it is optimized for speech. Therefore, it won’t provide the best results when used for complex audio signals like music.**Q10: What kind of equipment or software supports G.723?**A: A variety of VoIP systems, multimedia communication applications, and digital audio broadcasting systems support G.723. However, due to its reduced presence in new technologies, support may be limited.

Related Tech Terms

  • Audio Compression
  • VoIP (Voice over Internet Protocol)
  • Codec (Coder-Decoder)
  • ADPCM (Adaptive Differential Pulse Code Modulation)
  • Bit Rate

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