supports video and audio compression (CO) and decompression (DEC) codecs or software. CODEC technology can effectively reduce the space occupied by digital storage. In computer systems, using hardware to complete CODEC can save CPU resources and improve system operating efficiency. The Codec chip encodes and compresses the transmission of AD-converted audio and video digital signals, and decodes the signals at the receiving end. The main function of the
Codec codec is to compress and decompress video signals. The computer industry defines true color through a 24-bit measurement system, which defines nearly a million colors, approaching the limits of human vision. This means that if a video needs to be played at 30 frames per second, up to 27MB of information must be transferred per second, and a 1GB hard drive can only store about 37 seconds of video information. Therefore, the information must be compressed. By discarding some digital information or image information that is easily ignored by our eyes and brains, the amount of information in the video is reduced. The software or hardware that compresses and decompresses video is a codec. Codec compression ratios range from a typical 2:1 to 100:1, making it possible to process large amounts of video data.
Codec chip - CJC8988
Codec chip - CJC8988 is a low power, high quality stereo codec that can be directly Pin to Pin replacement for WM8988, designed for portable digital audio applications. The device integrates a complete interface to 2 stereo headphone or line output ports. External component requirements are greatly reduced as a separate headphone amplifier is not required. Advanced on-chip digital signal processing implements graphic equalizer, three-dimensional sound enhancement and automatic level control for the microphone or line input. The
CJC8988 can operate as a master or slave with a variety of master clock frequencies, including 12 or 24MHz, or standard 256fs frequencies such as 12.288MHz and 24.576MHz. Different audio sample rates, such as 96 kHz, 48 kHz, 44.1 kHz, are generated directly from the master clock without the need for an external PLL. The
CJC8988 operates with the supply voltage reduced to 1.8V, although the digital core can operate with the voltage reduced to 1.5V to save power, and the maximum voltage for all supplies is 3.3V. Different parts of the chip can also be powered down under software control. The CJC8988 is available in a very small and thin 4x4mm COL package, ideal for use in handheld and portable systems. Features of
Codec Chip - CJC8988:
DAC SNR 93 dB ("A" weighted), THD -87dB at 48 kHz, 1.8V
ADC SNR 91 dB ("A" weighted), THD -81dB at 48 kHz, 1.8 V
2 on-chip headphone driver
-THD-78dB, signal-to-noise ratio 93 dB, 16Ω load Hz, 1.8V
digital graphic equalizer
low magnification (microscope)
-7.8mW stereo player (1.8V power supply)
- 16.8mW record and playback (1.8V power supply)
low supply voltage
- analog 1.8V to 3.3V
- digital movement: 1.5V to 3.3V
- digital input I/O: 1.8V to 3.3V
256fs/384fs or USB master clock Rate: 12MHz, 24MHz
audio sampling rate: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48
88.2, 96kHz generated internally from the main clock
4x4mmCOL packaging
In the field of domestic audio decoder chips, Wuhan Guanghua Core The production of domestic chip CJC8988 is one of the best. To learn more about the technical applications of Wuhan Guanghuaxin’s domestic audio decoder chips, please log on to the official website of Gongcai.com for consultation.
