Communication apparatus that selectively uses codecs, method of controlling the communication apparatus, and storage medium

A non-transitory computer-readable storage medium storing a computer-executable program for causing a computer to execute a method of controlling a communication apparatus including a first codec unit configured to encode and decode images and a second codec unit configured to encode and decode images at higher speed than said first codec unit,

• wherein the method comprises:
• causing the second codec unit to encode or decode an image in a case where the communication apparatus performs facsimile communication with a facsimile machine connected to an IP network;
• and
• causing the first codec unit to encode or decode the image in a case where the communication apparatus performs facsimile communication with a facsimile machine connected to an analog network.

A communication apparatus comprising:

• a first codec unit configured to encode and decode images;
• a second codec unit configured to encode and decode images at higher speed than said first codec unit;
• and
• a control unit configured to cause said first codec unit to encode or decode an image in a case where the communication apparatus performs facsimile communication with a facsimile machine connected to an IP network and communication speed of the facsimile communication does not exceed a threshold value, and to cause said second codec unit to encode or decode the image in a case where the communication apparatus performs facsimile communication with the facsimile machine connected to the IP network and the communication speed of the facsimile communication exceeds the threshold value.