What is G.723?
G.723 ist eine veraltete ITU-T-Empfehlung, die nun durch den Standard G.726 abgelöst wird. Es wurde als eine Erweiterung zu G.721 geschrieben, die den Titel ’32 kbit / s adaptive differentielle Pulscodemodulation (ADPCM)‘ erhielt. Das Ziel von G.723 war, die Bitraten 24 kbit / s und 40 kbit / s hinzuzufügen . Der Standard war einer der ITU-T G-Serie mit dem Titel ‚Übertragungssysteme und Medien, digitale Systeme und Netzwerke.‘ ADPCM ist eine Technologie, die zum Codieren von digitalem Audio verwendet wird.
The International Telecommunication Union (ITU) is a branch of the United Nations that deals with information and communication technologies. ITU-T is a subgroup of this agency known as the telecommunications standardization sector. The G-Series recommendations are among the many standards specified by the organization. As with any dynamic standards organization, these specifications are constantly evolving and improving.
The full title of the omitted specification explains what it does: 'Extensions to Recommendation G.721 adaptive differential pulse code modulation to 24 and 40 kbit / s for digital circuit multiplication equipment application.' G.721 only transmitted at 32 kbit / s, but G.723 added two bit rates to the capability. G.723 and its neighboring recommendations were included in the family of standards for processing digital audio signals. ADPCM converts analog signals into digital signals by sampling. ADPCM is considered a codec (coder-decoder) due to its conversion of the audio signal.
G.721 was founded in 1984 and G.723 in 1988. The G.726 recommendation replaced both G.721 and G.723 in 1990. G.726 also uses ADPCM, but adds 16 kbit / s to the other bit rates and offers other advantages.
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