ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND TRANSMISSION SYSTEM

• Main Authors: ANDO, KATSUTOSHI, HOSAKA, KAZUHISA, FUKUHARA, TAKAHIRO
• Format: Patent
• Language: English; French; German
• Published: 30.03.2011
• Subjects: BASIC ELECTRONIC CIRCUITRY; CALCULATING; CODE CONVERSION IN GENERAL; CODING; COMPUTING; COUNTING; DECODING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

The present invention relates to an encoding device and method, a decoding device and method, and a transmission system, wherein encoding and decoding can be performed at higher speeds. A maximum significant digit calculating unit 63 calculates the maximum significant digits of predetermined w quantized coefficients. A VLC encoding unit 64 outputs code indicating a maximum significant digit, based on the calculation results. A significant digit extracting unit 65 extracts the significant digits of each of w quantized coefficients based on the maximum significant digit. A VLC encoding unit 66 outputs code indicating the absolute values of the w quantized coefficients, based on the extracted significant digits. A sign extracting unit 67 extracts signs from the w quantized coefficients, indicating whether each quantized coefficient is positive or negative. A VLC encoding unit 68 outputs code indicating w signs.