Information processing apparatus and method

An information processing method for an information processing apparatus having a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section, the information processing method comprising the steps of:

• causing first controlling means to recursively repeat analysis filter processing, the analysis filter processing being processing in which analysis filtering for decomposing frequency components of image signals into low frequency components and high frequency components is performed in both a horizontal direction and a vertical direction, a first predetermined number of times on horizontal and vertical low frequency component coefficients obtained as a result of computation of the analysis filter processing, by temporarily storing, in the first storage section, coefficients obtained during a process of the computation in the analysis filter processing and horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing and reusing the coefficients obtained during the process of the computation and the horizontal and vertical low frequency component coefficients obtained as a result of the computation;
• causing second controlling means to cause the horizontal and vertical low frequency component coefficients, obtained as a result of the computation in the analysis filter processing performed the first predetermined number of times, to be stored in the second storage section;
• causing third controlling means to read the coefficients stored in the second storage section, after the analysis filter processing is performed the first predetermined number of times;
• and
• causing fourth controlling means to input the coefficients stored in the second storage section and to recursively repeat the analysis filter processing a second predetermined number of times on the horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing, by temporarily storing, in the first storage section, the coefficients obtained during the process of the computation in the analysis filter processing and the horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing and reusing the coefficients obtained during the process of the computation and the horizontal and vertical low frequency component coefficients obtained as a result of the computation.

An information processing apparatus, comprising:

• a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section;
• filtering means for recursively repeating synthesis filter processing, the synthesis filter processing being processing in which synthesis filtering for combining low frequency components and high frequency components of frequency components of image signals is performed in both a vertical direction and a horizontal direction, by using coefficients, obtained as a result of the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level;
• first controlling means for causing coefficients obtained during a process of computation in the synthesis filter processing and, except for a preset decomposition level, the coefficients obtained as a result of the computation in the synthesis filter processing to be stored in the first storage section independently for each decomposition level, reading the coefficients stored in the first storage section, as appropriate, and supplying the read coefficients for the synthesis filter processing;
• and
• second controlling means for causing the coefficients of the preset decomposition level, the coefficients being obtained as a result of the computation in the synthesis filter processing, to be stored in the second storage section, reading the coefficients stored in the second storage section, as appropriate, and supplying the read coefficients for the synthesis filter processing.

An information processing method for an information processing apparatus having a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section, the information processing method comprising the steps of:

• causing first controlling means to recursively repeat synthesis filter processing, the synthesis filter processing being processing in which synthesis filtering for combining low frequency components and high frequency components of frequency components of image signals is performed in both a vertical direction and a horizontal direction, a first predetermined number of times by using coefficients, obtained as a result of computation of the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level, by temporarily storing, in the first storage section, coefficients obtained during a process of the computation in the synthesis filter processing and the coefficients obtained as a result of the computation in the synthesis filter processing and reusing the coefficients obtained during the process of the computation and the coefficients obtained as a result of the computation;
• causing second controlling means to cause the coefficients, obtained as a result of the computation in the synthesis filter processing performed the first predetermined number of times, to be stored in the second storage section;
• causing third controlling means to read the coefficients stored in the second storage section, after the synthesis filter processing is performed the first predetermined number of times;
• and
• causing fourth controlling means to input the coefficients stored in the second storage section and to recursively repeat the synthesis filter processing a second predetermined number of times, by using the coefficients, obtained as a result of the computation in the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level, by temporarily storing, in the first storage section, the coefficients obtained during the process of the computation in the synthesis filter processing and the coefficients obtained as a result of the computation in the synthesis filter processing and reusing the coefficients obtained during the process of the computation and the coefficients obtained as a result of the computation.

An information processing apparatus, comprising:

• a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section;
• a filtering section configured to recursively repeat analysis filter processing, the analysis filter processing being processing in which analysis filtering for decomposing frequency components of image signals into low frequency components and high frequency components is performed in both a horizontal direction and a vertical direction, on horizontal and vertical low frequency component coefficients obtained as a result of the analysis filter processing, until a predetermined decomposition level is reached;
• a first controlling section configured to cause coefficients obtained during a process of computation in the analysis filter processing and, except for a preset decomposition level, horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing to be stored in the first storage section independently for each decomposition level, to read the coefficients stored in the first storage section, as appropriate, and to supply the read coefficients for the analysis filter processing;
• and
• a second controlling section configured to cause the horizontal and vertical low frequency component coefficients of the preset decomposition level, the coefficients being obtained as a result of the computation in the analysis filter processing, to be stored in the second storage section, to read the coefficients stored in the second storage section, as appropriate, and to supply the read coefficients for the analysis filter processing.

An information processing method for an information processing apparatus having a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section, the information processing method comprising the steps of:

• causing a first controlling section to recursively repeat analysis filter processing, the analysis filter processing being processing in which analysis filtering for decomposing frequency components of image signals into low frequency components and high frequency components is performed in both a horizontal direction and a vertical direction, a first predetermined number of times on horizontal and vertical low frequency component coefficients obtained as a result of computation of the analysis filter processing, by temporarily storing, in the first storage section, coefficients obtained during a process of the computation in the analysis filter processing and horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing and reusing the coefficients obtained during the process of the computation and the horizontal and vertical low frequency component coefficients obtained as a result of the computation;
• causing a second controlling section to cause the horizontal and vertical low frequency component coefficients, obtained as a result of the computation in the analysis filter processing performed the first predetermined number of times, to be stored in the second storage section;
• causing a third controlling section to read the coefficients stored in the second storage section, after the analysis filter processing is performed the first predetermined number of times;
• and
• causing a fourth controlling section to input the coefficients stored in the second storage section and to recursively repeat the analysis filter processing a second predetermined number of times on the horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing, by temporarily storing, in the first storage section, the coefficients obtained during the process of the computation in the analysis filter processing and the horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing and reusing the coefficients obtained during the process of the computation and the horizontal and vertical low frequency component coefficients obtained as a result of the computation.

An information processing apparatus, comprising:

• a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section;
• a filtering section configured to recursively repeat synthesis filter processing, the synthesis filter processing being processing in which synthesis filtering for combining low frequency components and high frequency components of frequency components of image signals is performed in both a vertical direction and a horizontal direction, by using coefficients, obtained as a result of the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level;
• a first controlling section configured to cause coefficients obtained during a process of computation in the synthesis filter processing and, except for a preset decomposition level, the coefficients obtained as a result of the computation in the synthesis filter processing to be stored in the first storage section independently for each decomposition level, to read the coefficients stored in the first storage section, as appropriate, and to supply the read coefficients for the synthesis filter processing;
• and
• a second controlling section configured to cause the coefficients of the preset decomposition level, the coefficients being obtained as a result of the computation in the synthesis filter processing, to be stored in the second storage section, to read the coefficients stored in the second storage section, as appropriate, and to supply the read coefficients for the synthesis filter processing.

An information processing method for an information processing apparatus having a first storage section and a second storage section, the first storage section having a smaller capacity and allowing higher speed access than the second storage section, the information processing method comprising the steps of:

• causing a first controlling section to recursively repeat synthesis filter processing, the synthesis filter processing being processing in which synthesis filtering for combining low frequency components and high frequency components of frequency components of image signals is performed in both a vertical direction and a horizontal direction, a first predetermined number of times by using coefficients, obtained as a result of computation of the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level, by temporarily storing, in the first storage section, coefficients obtained during a process of the computation in the synthesis filter processing and the coefficients obtained as a result of the computation in the synthesis filter processing and reusing the coefficients obtained during the process of the computation and the coefficients obtained as a result of the computation;
• causing a second controlling section to cause the coefficients, obtained as a result of the computation in the synthesis filter processing performed the first predetermined number of times, to be stored in the second storage section;
• causing a third controlling section to read the coefficients stored in the second storage section, after the synthesis filter processing is performed the first predetermined number of times;
• and
• causing a fourth controlling section to input the coefficients stored in the second storage section and to recursively repeat the synthesis filter processing a second predetermined number of times, by using the coefficients, obtained as a result of the computation in the synthesis filter processing, as horizontal and vertical low frequency component coefficients of a decomposition level that is higher by one level, by temporarily storing, in the first storage section, the coefficients obtained during the process of the computation in the synthesis filter processing and the coefficients obtained as a result of the computation in the synthesis filter processing and reusing the coefficients obtained during the process of the computation and the coefficients obtained as a result of the computation.