Apparatus and method of encoding moving picture signal

An apparatus for encoding input moving pictures with motion-compensated prediction, the apparatus comprising:

• a code amount detector to detect an amount of codes generated for each encoded picture of the input moving pictures;
• a factor detector to detect an average quantization scale factor of quantization scale factors used for quantizing the pictures of the input moving pictures when encoded;
• a characteristics detector to detect picture characteristics of at least the input moving pictures;
• a calculator, responsive to the generated amount of codes and the average quantization scale factor, to calculate complexity of each encoded picture and a present picture to be encoded;
• a code amount decider to decide a target code amount for a predetermined period, based on the generated amount of codes;
• and
• a controller, responsive to the generated amount of codes generated, picture characteristics, complexity of the picture, and target code amount, to decide an amount of codes to be allocated to a present picture to be encoded, for obtaining a quantization scale factor for the present picture.

An apparatus for encoding input moving pictures with motion-compensated prediction, the apparatus comprising:

• a code amount detector to detect an amount of codes generated for each encoded picture of the input moving pictures;
• a factor detector to detect an average quantization scale factor of quantization scale factors used for quantizing the pictures of the input moving pictures when encoded;
• an amount setter to set a target code amount based on a recording time for recording the input moving pictures;
• a margin setter to set a margin of the generated amount of codes based on the recording time, the margin being modified based on a difference between the generated amount of codes and the target average code amount;
• and
• a controller to decide a code amount to be allocated for a predetermined period by adding the margin and the target average code amount, and obtaining a quantization scale factor for a present picture to be coded based on the code amount to be allocated, the present picture being encoded by using the obtained quantization scale factor when larger than a minimum quantization scale factor set based on the target average code amount.

A method of encoding input moving pictures with motion-compensated prediction, the method comprising the steps of:

• detecting an amount of codes generated for each encoded picture of the input moving pictures;
• detecting an average quantization scale factor of quantization scale factors used for quantizing the pictures of the input moving pictures when encoded;
• detecting picture characteristics of at least the input moving pictures;
• calculating complexity of each picture in response to the amount of codes generated for each picture, the average quantization scale factor and the picture characteristics;
• and
• deciding an amount of codes to be allocated to a present picture to be encoded in response to the amount of codes generated for each picture, picture characteristics and the complexity of each picture, for obtaining a quantization scale factor for the present picture.

A method of encoding input moving pictures with motion-compensated prediction, the method comprising the steps of:

• detecting an amount of codes generated for each encoded picture of the input moving pictures;
• detecting an average quantization scale factor of quantization scale factors used for quantizing the pictures of the input moving pictures when encoded;
• detecting picture characteristics of at least the input moving pictures;
• calculating complexity of each encoded picture and a present picture to be encoded in response to the generated amount of codes and the average quantization scale factor;
• deciding a target code amount for a predetermined period, based on the generated amount of codes;
• and
• deciding an amount of codes to be allocated to a present picture to be encoded, in response to the generated amount of codes generated, picture characteristics, complexity of the picture, and target code amount, for obtaining a quantization scale factor for the present picture.

A method of encoding input moving pictures with motion-compensated prediction, the method comprising the steps of:

• detecting an amount of codes generated for each encoded picture of the input moving pictures;
• detecting an average quantization scale factor of quantization scale factors used for quantizing the pictures of the input moving pictures when encoded;
• setting a target code amount based on a recording time for recording the input moving pictures;
• setting a margin of the generated amount of codes based on the recording time, the margin being modified based on a difference between the generated amount of codes and the target average code amount;
• deciding a code amount to be allocated for a predetermined period by adding the margin and the target average code amount;
• and
• obtaining a quantization scale factor for a present picture to be coded based on the code amount to be allocated, the present picture being encoded by using the obtained quantization scale factor when larger than a minimum quantization scale factor set based on the target average code amount.