UPD61052GD-LML datasheet(21/108 Pages) RENESAS

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Data Sheet S15082EJ4V0DS

µPD61051, 61052

2.2

Audio

This LSI encodes the MPEG audio encoding and transcode with the internal DSP.

2.2.1

Encoding

It encodes MPEG1 audio layer 2 or Dolby Digital Consumer Encoder (only the

µPD61052). In addition, it is

possible to bypass internal audio encode DSP, when the audio elementary stream is encoded by an external audio

encoder are inputted.

2.2.2

Transcoding (DEMUX, MUX)

It is possible to multiplex two de-multiplexed audio streams. It analyzes MPEG1 audio stream, and extracts the

information to multiplex and notify to the host CPU.

2.2.3

Input/output processing

Two PCM audio signals can be inputted to the audio input interface and the audio input-output interface. When

inputting two audio signals, an audio signal is encoded, and another one bypasses the audio encoding DSP, and

transfers to the multiplexer. When inputting an audio elementary stream that has been encoded by the external audio

encoder and PCM audio, it can multiplex two audio elementary streams.

The PCM audio or the audio elementary stream can be outputted from the audio input-output interface. The audio

clock (AMCLK) types the clock by which a phase was locked up STC clock (STCLK).

Table 2-4. Audio Input/output

Item

Input/output format

Data length

16 bits, 20 bits, 24 bits

Sampling frequency

32 kHz, 44.1 kHz, 48 kHz

Justification of transfer

MSB first

2S Compatible/Left justified/Right justified

Format

PCM Audio, IEC60958 based

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