摘要:
Provided is a digital broadcast transmitting device including: a packet generation unit (51, 52) configured to generate a packetized elementary stream (PES) data by encoding and converting an inputted voice signal into an encoded voice signal and generating a voice stream packet including the encoded voice signal; a descriptor updating unit (57) configured to update a component descriptor including a component type identification (ID) indicating that a voice encoding system is MPEG surround and a change reservation ID indicating change reservation of a voice component type; a packetizing unit (54) configured to generate section data by packetizing the updated component descriptor; a multiplexing unit (55) configured to multiplex the PES data and the section data; and a modulation unit (56) configured to modulate and transmit multiplexed data acquired from said multiplexing unit.
摘要:
A stereo encoding method, a stereo encoding device, and an encoder are provided. The stereo encoding method includes: obtaining a left channel energy relation coefficient and a right channel energy relation coefficient; obtaining a left energy sum and a right energy sum respectively; performing cross correlation between sub-bands of a first monophonic signal at a wave trough and sub-bands of the left channel signal according to the left channel energy relation coefficient, and performing cross correlation between sub-bands of the first monophonic signal at the wave trough and sub-bands of the right channel signal according to the right channel energy relation coefficient; obtaining a scaling factor by using the left energy sum, the right energy sum, and cross correlation results; and encoding the stereo left and right channel signals according to the scaling factor.
摘要:
A stereo encoding method, a stereo encoding device, and an encoder are provided. The stereo encoding method includes: obtaining a left channel energy relation coefficient and a right channel energy relation coefficient; obtaining a left energy sum and a right energy sum respectively; performing cross correlation between sub-bands of a first monophonic signal at a wave trough and sub-bands of the left channel signal according to the left channel energy relation coefficient, and performing cross correlation between sub-bands of the first monophonic signal at the wave trough and sub-bands of the right channel signal according to the right channel energy relation coefficient; obtaining a scaling factor by using the left energy sum, the right energy sum, and cross correlation results; and encoding the stereo left and right channel signals according to the scaling factor.
摘要:
A stereo encoding method, a stereo encoding device, and an encoder are provided. The stereo encoding method includes: obtaining a left channel energy relation coefficient and a right channel energy relation coefficient; obtaining a left energy sum and a right energy sum respectively; performing cross correlation between sub-bands of a first monophonic signal at a wave trough and sub-bands of the left channel signal according to the left channel energy relation coefficient, and performing cross correlation between sub-bands of the first monophonic signal at the wave trough and sub-bands of the right channel signal according to the right channel energy relation coefficient; obtaining a scaling factor by using the left energy sum, the right energy sum, and cross correlation results; and encoding the stereo left and right channel signals according to the scaling factor.
摘要:
A method for controlling the peak levels of an FM composite signal is described. First, the FM signal is clipped to obtain an error signal (10). This signal comprises the 'clippings' resulting from the clipping operation. Next, the peaks of the error signal are determined (12). Then, a half-cosine wave is fitted to each of the peaks (14). The resultant half-cosine-interpolated signal is filtered to provide a filtered error signal (16) and the filtered error signal is subtracted from the FM composite signal (18).