Encoding apparatus, control method for encoding apparatus and program

An encoding apparatus which performs bit rate control, the encoding apparatus comprising:

• an acquiring unit configured to acquire a first quantization parameter as a quantization parameter to be used for quantizing a rate control unit;
• a first calculating unit configured to calculate an evaluation value from a preset rate and a rate of an actually encoded rate control unit;
• a first setting unit configured to, if the evaluation value is within a predetermined range, set the first quantization parameter acquired by the acquiring step as a quantization parameter to be used for quantizing a rate control unit;
• and
• a second setting unit configured to, if the evaluation value is not within the predetermined range, setting a second quantization parameter on the basis of the calculated evaluation value as a quantization parameter to be used for quantizing a rate control unit.

A computer program to be read and executed by a computer to cause the computer to function as an encoding apparatus, the program comprising:

• an acquiring step of acquiring a first quantization parameter as a quantization parameter to be used for quantizing a rate control unit;
• a first calculating step of calculating an evaluation value from a preset rate and a rate of an actually encoded rate control unit;
• a first setting step of, if the evaluation value is within a predetermined range, setting the first quantization parameter acquired by the acquiring step as a quantization parameter to be used for quantizing a rate control unit;
• and
• a second setting step of, if the evaluation value is not within the predetermined range, setting a second quantization parameter on the basis of the calculated evaluation value as a quantization parameter to be used for quantizing a rate control unit.